Database Users

(SOLVED) need help unbricking A500 with nvFlash

so I traded an older compaq laptop for this bricked Iconia A500 and they must have really borked it up because all the "normal" unbricking methods will not work, it will not pull the update.zip from the SD card about 10 -15 minutes in I get the LNX checksum error, same thing if I try to factory reset it hangs on Erasing cache... then back to the LNX checksum error. I have tried reflashing a stock EUU ROM in APX mode but it just hangs and wont update. I was able to get the UID by using the usb traffic sniffer and I created the SKB from the website. so now I can get it in APX mode but I am new to the Tegra tablets so I have no idea what I should see or do with the nvFlash, I am a pretty techincal guy and can usually figure stuff out by using common sense but I am sure I am missing something with this nvFlash program. I notice if I send the tablet a command with nvflash (like --sync) it will come back with the normal error but it will also cut off the usb connection and to send any more commands I have to restart APX mode (while in windows, I havent noticed it do that in ubuntu) if anyone has any experience in this and knows the steps to get it back from the abyss I would really appreciate it. I have tried following sc2k's thread on the checksum errors but it won't work because I fall under the "any other recovery" and he said to contact him or post for help, I contacted him 2 days ago and haven't got an answer yet, (I am sure he is busy) so I am going to ask for help here in the meantime.

I think you can try this way:
[downloading necessary files]:
1. pls refer to How to root stock 3.2 and download root-3.2.1-V4.7z
[actions:]
1. extract files from root-3.2.1-V4.7z to c:\a500unbrick
2. go to folder c:\a500unbrick and fined .pdf file with instractions. Read it carefully and follow it.
at the end of this process you will have os 3.2.1 with custom recovery.

a.chursin said:
I think you can try this way:
[downloading necessary files]:
1. pls refer to How to root stock 3.2 and download root-3.2.1-V4.7z
[actions:]
1. extract files from root-3.2.1-V4.7z to c:\a500unbrick
2. go to folder c:\a500unbrick and fined .pdf file with instractions. Read it carefully and follow it.
at the end of this process you will have os 3.2.1 with custom recovery.
Click to expand...
Click to collapse
Thanks I will look into it, but if it needs adb or booting from sd card its a no go because it won't read update.zip (lack of proper recovery image?) Nor can I use adb, the only way I can send commands is through APX mode.
Sent from my Galaxy Nexus using XDA

it doesn't need adb or sdcard update.zip - it's "apx moode" way of flashing

a.chursin said:
it doesn't need adb or sdcard update.zip - it's "apx moode" way of flashing
Click to expand...
Click to collapse
thanks will try this when I get home from work, I found everything under the sun to unbrick except this way. so I am hoping this will work.

still will not work
I have tried the PBJ20upgrade.exe and I know it says to use APX mode in there but it doesn't work as stated in the OP and that is why I said it needs to be with nvFlash, nothing else is working at all. it will just hang at 1/8th done for well over 20 minutes.
thanks for replying though and trying to help.
anyone have experience with nvFlash that can help?
this is how far it gets when I try using nvflash in the command line:
nvflash --bct flash.bct --setbct --configfile flash.cfg --create --odmdata 0xb00d8011 --bl bootloader.bin --sbk 0x45DC1E00 0x48A7F501 0xA7EE1103 0xB0512103 --go
Nvflash started
rcm version 0X20001
System Information:
chip name: t20
chip id: 0x20 major: 1 minor: 3
chip sku: 0x8
chip uid: 0x037c61c9434032d7
macrovision: disabled
hdcp: enabled
sbk burned: true
dk burned: true
boot device: emmc
operating mode: 4
device config strap: 0
device config fuse: 0
sdram config strap: 0
sending file: flash.bct
data send failed NvError 0x120000
setbct failed NvError 0x0
command failure: bootloader download failed
C:\Users\Jon\Desktop\Acer Tab A500\root-3.2.1\Image>

GOT IT!!!
I got it!! I had to boot into Ubuntu and run the same nvflash command and it worked like a charm, I am currently sporting 3.2.1. now to get some ICS on this thing
thanks for your help a.chursin.

Your welcom

help!
Could someone please help me with this?? Im stuck with the green Acer screen. Bootloader is hosed, I can get it to APX mode, no adb, no recovery, no fastboot.....I think I can use NVflash to flash a recovery and then flash an update.exe, I just dont know the commands. When I try nvflash --sync, the nvidia APX driver in device manager just dissapears and I have to put the tablet back in APX mode.

cooki3monst3r77 said:
Could someone please help me with this?? Im stuck with the green Acer screen. Bootloader is hosed, I can get it to APX mode, no adb, no recovery, no fastboot.....I think I can use NVflash to flash a recovery and then flash an update.exe, I just dont know the commands. When I try nvflash --sync, the nvidia APX driver in device manager just dissapears and I have to put the tablet back in APX mode.
Click to expand...
Click to collapse
How did u get yrself into this will need more info to help BUT
the green recovery screen suggests its the HC recovery image
If u r on HC then I have a feeling nv/fast boot only works on an unlocked b/l which 3.2 is not, but I'm not 100% on that
U can try an EUU based flash as u say apx mode is still available to u
Timmydeanv4 for gen2 stock, else EUU from vaches thread

Ncvflash commands
windows. nvflash --help
Linux. ./nvflash --help

a.chursin said:
I think you can try this way:
[downloading necessary files]:
1. pls refer to How to root stock 3.2 and download root-3.2.1-V4.7z
[actions:]
1. extract files from root-3.2.1-V4.7z to c:\a500unbrick
2. go to folder c:\a500unbrick and fined .pdf file with instractions. Read it carefully and follow it.
at the end of this process you will have os 3.2.1 with custom recovery.
Click to expand...
Click to collapse
This solved my issue, thanks.
I was triyng to update BL to ICS.BL and it actually updates to the BL nicely, but whathever i have tried could no pass the boot, always getting bootloop. So i downgraded it and its working like a charm.
Thanks again.

Would someone help me? I just installed CM10 Jelly bean for Iconia A500 and flashed the corresponding GApss right after. Now I'm stuck on Acer logo and can't go to recovery. Help.

xmond said:
Would someone help me? I just installed CM10 Jelly bean for Iconia A500 and flashed the corresponding GApss right after. Now I'm stuck on Acer logo and can't go to recovery. Help.
Click to expand...
Click to collapse
Can you boot in download mode to clean cache? (Power + Vol+)
Or, can you boot in recovery after shut down device?
If not try it and then tell us.

GueDS said:
Can you boot in download mode to clean cache? (Power + Vol+)
Or, can you boot in recovery after shut down device?
If not try it and then tell us.
Click to expand...
Click to collapse
No, I can't go into recovery even after shutting down the device. It's stuck on Acer logo. Help me please.
*Edit:* Booted in download mode and did a cache wipe. That did the trick! My device is now booting! THANKS A LOT!

xmond said:
No, I can't go into recovery even after shutting down the device. It's stuck on Acer logo. Help me please.
*Edit:* Booted in download mode and did a cache wipe. That did the trick! My device is now booting! THANKS A LOT!
Click to expand...
Click to collapse
I´m glad to help :good:

GueDS said:
I´m glad to help :good:
Click to expand...
Click to collapse
Yeah. Thanks again! So happy with my new OS!

Urgent! CPUID from apx mode
jitajt said:
so I traded an older compaq laptop for this bricked Iconia A500 and they must have really borked it up because all the "normal" unbricking methods will not work, it will not pull the update.zip from the SD card about 10 -15 minutes in I get the LNX checksum error, same thing if I try to factory reset it hangs on Erasing cache... then back to the LNX checksum error. I have tried reflashing a stock EUU ROM in APX mode but it just hangs and wont update. I was able to get the UID by using the usb traffic sniffer and I created the SKB from the website. so now I can get it in APX mode but I am new to the Tegra tablets so I have no idea what I should see or do with the nvFlash, I am a pretty techincal guy and can usually figure stuff out by using common sense but I am sure I am missing something with this nvFlash program. I notice if I send the tablet a command with nvflash (like --sync) it will come back with the normal error but it will also cut off the usb connection and to send any more commands I have to restart APX mode (while in windows, I havent noticed it do that in ubuntu) if anyone has any experience in this and knows the steps to get it back from the abyss I would really appreciate it. I have tried following sc2k's thread on the checksum errors but it won't work because I fall under the "any other recovery" and he said to contact him or post for help, I contacted him 2 days ago and haven't got an answer yet, (I am sure he is busy) so I am going to ask for help here in the meantime.
Click to expand...
Click to collapse
Hey man I'm really desperate to know how can I get my CPUID from apx mode. I foolishly formatted mmcblk0 and now it won't even boot. And the only mode I can get in is apx mode. How can I solve this? what is usb sniffer? Can you giive me the link?

felix, if you'd read the cpuid guide like i suggested you would know exactly where and how to use a usb sniffer to retrieve your cpuid... you provided bugger all details about your situation other than to say its bricked...take a deep breath and slow down, unbricking has to be done according to strict rules otherwise you'll end up going round in circles, its a process thats not gonna take 5 mins...and posting in 6month old threads expecting an answer probly isnt gonna help neither...there is an unbricking guide in my sig, post in that if you need to
dibb

What Command
jitajt said:
I got it!! I had to boot into Ubuntu and run the same nvflash command and it worked like a charm, I am currently sporting 3.2.1. now to get some ICS on this thing
thanks for your help a.chursin.
Click to expand...
Click to collapse
What was the command you use in Ubuntu to get nvflash to run? please send me the string you use, i am in the same as you was i only have apx mode on the acer a500

Solution: Unlocked bootloader Installation

One of my counterparts in Germany asked me to post it here. All credit goes to opec. This has been covered a few times, but I like the detailed scenario.
**************************
ERROR: Can´t installl hacked ICS Bootloader
I tried installing Hacked ICS Bootloader in Order to get Moscow Desire´s "Alexandra V a501 ICS 4.0.3 ver 1.4 Final" running on my a501.
The following ways of flashing could get the hacked bootloader on my a501:
"Afterota for A600/G100W" (http://forum.xda-developers.com/show....php?t=1675939),
"blackthund3r´s ATX flash tool A500APXFlash.exe" (see "Automated flashing tools" at http://forum.xda-developers.com/showthread.php?t=1622425")
"Manual flashing via nvflash" (see Manual flashing at http://forum.xda-developers.com/show....php?t=1622425)
Trying to flash with this tools always brought me to a Command Promt saying:
Nvflash started
[resume mode]
APX flash tool hang when it tired to Format Partition 4 etc.
and then doing nothing even if i let it stay for hours. No Information or Error so long.
When i tried flashing manualy (see link above)i finaly saw an error:
failed executing command 25 NvError 0x120002
command failure: sync failed (bad data)
bootloader status: partition table is invalid, missing required information
e: 14) message: nverror:0x4 (0x4) flags: 0
So it seemed however that the partition table on my a501 got messed up. Asking google for "failed executing command 25 NvError 0x120002" brought me to an answer "lcd047" posted on tegraowners (http://forum.tegraowners.com/viewtop...p=15285#p15331)
He desicrbes same problem with messed up partition table an restoring it with timmyDean´s root-3.2.1-V4.7z (http://forum.xda-developers.com/show...&postcount=1):
lcd047 wrote:
"I downloaded timmyDean's root-3.2.1-V4.7z
I booted the tablet (in APX mode) and I connected the USB cable to it
in the directory root-3.2.1/Image I run the command
nvflash --bct flash.bct --setbct --odmdata 0x100c0105 --configfile flash.cfg --create --bl bootloader.bin --sbk (your sbk number after converting your UID number) 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX --go
without rebooting, I flashed the v7 bootloader and recovery as per the bootloader thread; since the partition table was restored at the previous step, the operation now succeeded;
I rebooted the tablet in recovery, and proceeded to wipe the data and flash a ROM the usual way.
And that worked for me. After flashing, my a501 did a automated reboot, i quickly killed the reboot by holding the Power Button (guessing killing the reboot is not realy necessary because the booting shouldn´t mess up the partition table again) and then brought the devive back to APX Mode (Holding Reset and Power for 3-4 sec. then releasing Power and after 1 second relesaing Reset).
Then i flashed the hacked bootloader via blackthund3rs APX flash tool (see link above).
Then i installed Alexandra V as Moscow Desire descirbes (see "To Install" at http://forum.xda-developers.com/show....php?t=1635577)
It took my 2 days of trial and error, but finaly give me a nice working Alexandra ROM on my a501!
Hope this helps people having the same issues.
Thanks to Moscow Desire, civato, blackthund3r, gersma, zeroNull, lcdß47, timmyDean
***************************************
Note from MD. You guys take note of this. Sometimes, when you get corrupted partition tables, you may have to go back to an HC stock bootloader to get them fixed. Of course there are other methods, but require some indepth knowledge, and this method most people can do easily.
MD

Borked Partition Table
Nice M...thanks for reposting this

will this work on a500

Moscow Desire said:
One of my counterparts in Germany asked me to post it here. All credit goes to opec. This has been covered a few times, but I like the detailed scenario.
Click to expand...
Click to collapse
After hours and hours, this right here was the solution I needed. Many, many thanks.

erndixon said:
After hours and hours, this right here was the solution I needed. Many, many thanks.
Click to expand...
Click to collapse
No problem. Sometimes things get buried back in the threads after awhile.
MD

Help
i'm use a501 3.2.1 stock HC and still unroot.
Now i wanna use alexV ROM, so i have flash ICS BL use blackthunder's flash tools and it's success, with V8a50pub recovery.
but my problem is:
1. still able to boot my stock HC ROM,
2. can't boot into recovery mode, it will display green robot with exclamation in its body
3. can i get guide to flash cwm recovery? i want use CWM-install-A500PubRecovery_v0.2.zip but its extension is .img and i dont know how to use it
sory if i asked noob question
thanks

Go on youtube and just search up how to root acer a500 , its the first video, steps are simple but i'm not too sure you can use pub recovery on honeycomb, after that use one of the flashing tools to install the hacked bootloader ( i prefer the apx flashtool, its fool proof pretty much with the sbk generator built in ) and download the v8 bootloader with your recovery choice and install it, there's even a guide on youtube on how to do it, hope it helps
Sent from my Iconia A501 using xda app-developers app

gigacats said:
i'm use a501 3.2.1 stock HC and still unroot.
Now i wanna use alexV ROM, so i have flash ICS BL use blackthunder's flash tools and it's success, with V8a50pub recovery.
but my problem is:
1. still able to boot my stock HC ROM,
2. can't boot into recovery mode, it will display green robot with exclamation in its body
3. can i get guide to flash cwm recovery? i want use CWM-install-A500PubRecovery_v0.2.zip but its extension is .img and i dont know how to use it
sory if i asked noob question
thanks
Click to expand...
Click to collapse
Please do not post duplicate issues in multiple threads. Please go to your original post.
MD

OK, sorry guys
Sent from my A501 using xda app-developers app

gigacats said:
OK, sorry guys
Sent from my A501 using xda app-developers app
Click to expand...
Click to collapse
No problem
Glad you got things running good. (in the other thread)
MD

Moscow Desire said:
One of my counterparts in Germany asked me to post it here. All credit goes to opec. This has been covered a few times, but I like the detailed scenario.
**************************
ERROR: Can´t installl hacked ICS Bootloader
I tried installing Hacked ICS Bootloader in Order to get Moscow Desire´s "Alexandra V a501 ICS 4.0.3 ver 1.4 Final" running on my a501.
The following ways of flashing could get the hacked bootloader on my a501:
"Afterota for A600/G100W" (http://forum.xda-developers.com/show....php?t=1675939),
"blackthund3r´s ATX flash tool A500APXFlash.exe" (see "Automated flashing tools" at http://forum.xda-developers.com/showthread.php?t=1622425")
"Manual flashing via nvflash" (see Manual flashing at http://forum.xda-developers.com/show....php?t=1622425)
Trying to flash with this tools always brought me to a Command Promt saying:
Nvflash started
[resume mode]
APX flash tool hang when it tired to Format Partition 4 etc.
and then doing nothing even if i let it stay for hours. No Information or Error so long.
When i tried flashing manualy (see link above)i finaly saw an error:
failed executing command 25 NvError 0x120002
command failure: sync failed (bad data)
bootloader status: partition table is invalid, missing required information
e: 14) message: nverror:0x4 (0x4) flags: 0
So it seemed however that the partition table on my a501 got messed up. Asking google for "failed executing command 25 NvError 0x120002" brought me to an answer "lcd047" posted on tegraowners (http://forum.tegraowners.com/viewtop...p=15285#p15331)
He desicrbes same problem with messed up partition table an restoring it with timmyDean´s root-3.2.1-V4.7z (http://forum.xda-developers.com/show...&postcount=1):
lcd047 wrote:
"I downloaded timmyDean's root-3.2.1-V4.7z
I booted the tablet (in APX mode) and I connected the USB cable to it
in the directory root-3.2.1/Image I run the command
nvflash --bct flash.bct --setbct --odmdata 0x100c0105 --configfile flash.cfg --create --bl bootloader.bin --sbk (your sbk number after converting your UID number) 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX --go
without rebooting, I flashed the v7 bootloader and recovery as per the bootloader thread; since the partition table was restored at the previous step, the operation now succeeded;
I rebooted the tablet in recovery, and proceeded to wipe the data and flash a ROM the usual way.
And that worked for me. After flashing, my a501 did a automated reboot, i quickly killed the reboot by holding the Power Button (guessing killing the reboot is not realy necessary because the booting shouldn´t mess up the partition table again) and then brought the devive back to APX Mode (Holding Reset and Power for 3-4 sec. then releasing Power and after 1 second relesaing Reset).
Then i flashed the hacked bootloader via blackthund3rs APX flash tool (see link above).
Then i installed Alexandra V as Moscow Desire descirbes (see "To Install" at http://forum.xda-developers.com/show....php?t=1635577)
It took my 2 days of trial and error, but finaly give me a nice working Alexandra ROM on my a501!
Hope this helps people having the same issues.
Thanks to Moscow Desire, civato, blackthund3r, gersma, zeroNull, lcdß47, timmyDean
***************************************
Note from MD. You guys take note of this. Sometimes, when you get corrupted partition tables, you may have to go back to an HC stock bootloader to get them fixed. Of course there are other methods, but require some indepth knowledge, and this method most people can do easily.
MD
Click to expand...
Click to collapse
So, While this did not actually work in my case, it led me to do a search on "TegraOwners" for "Partition Table damaged" where I found "BadSector" which totally fixed my problem. So, A Hearty thanks to you Moscow Desire, as well as to BlackThund3r, for without his direction, I never would found your post either.
That being said, a big thanks to all the Dev's on this site, for without their hard work, there would be no reason for any of the fine information available on this site!

Hey i have a similar problem and i cant figure it out ..heres what i get:
bootloader downloaded successfulyy
setting device: 2 3
creating partition: BCT
failed executing command 16 NvError 0x120002
bootloader status: failed to create the partition <code : 10> message: nverror:0x5
<0x1000005> flags: 0
What is the problem here ?
timmydeans toolkit doesnt work for me,bad sector also doesnt work, But i can see my device in safe and remove hardware...

moizsami said:
Hey i have a similar problem and i cant figure it out ..heres what i get:
bootloader downloaded successfulyy
setting device: 2 3
creating partition: BCT
failed executing command 16 NvError 0x120002
bootloader status: failed to create the partition <code : 10> message: nverror:0x5
<0x1000005> flags: 0
What is the problem here ?
timmydeans toolkit doesnt work for me,bad sector also doesnt work, But i can see my device in safe and remove hardware...
Click to expand...
Click to collapse
If these 2 tools "don't work" there are only 2 possibilities
a) you're not doing things correctly
b) your tab has a faulty memory chip and needs a replacement motherboard

Acer a500 stock on acer logo-dead andriod red triangle
Moscow Desire said:
No problem. Sometimes things get buried back in the threads after awhile.
MD
Click to expand...
Click to collapse
Hello Sir
I have seen lots of post from you regarding Hacer a500 tab, I am not a geek nor a tech, but I do have this tab stock on Hacer logo, and when I tried to hard reset it takes me to dead andriod, please help me out here, with steps to bring back my tab back to life..thanks

Bricked and stranded A500

I have an ancient stock HC 3.2 and decided it would be nice to update. Forgetting completely about the fact that I had the ancient honeycomb bootloader as well, I loaded up an ICS update.zip and flashed. Now I'm stuck with a broken tab that displays Boot verification failed on startup. I have access to APX mode, but my computer does not seem to be cooperating with the drivers.
What to do?

Same kind of Problem
I have an A500 with OTA 4.01 o it.
I rooted it successively
Added bootloader ICS - worked fine - could see loader on reboot - used afterOTA
Backuped rom onto SD
Went in to recovery mode and installed JellyBean X rom - I wiped every thing including cache's
Installed fine, went to reboot and nothing.
Power light goes on and that's it.
I have tried several utilties but most need the computer to see A500 as a device or say failed, or do nothing
The "ejectAPX" shows on the eject hardware ion, and ACER USB drivers show up in device manager
I have tried resets, volume buttons etc - no go
The A500 screen did come up with "Acer Download Mode", but that as far as I get.
Any detailed help would be appreciated!
Win7 computer
David
Update
I do have mu cpuid and SBK #
I tried Blackthund3r APX flash tool, using A500_A501_ICS_V7_bootloader
BThdr says APX detected
Tab enters in to download mode with ACER logo on screen,
stage one ok
stage 2 just hangs at 3 quaters the way - I waited over 5 minutes
I have tried the following command with theresults after:
nvflash --bct flash.bct --setbct --odm
data 0x100c0105 --configfile flash.cfg --create --bl bootloader.bin --sbk 0x04FF
1E00 0xABE0D706 0xEBAA3304 0x20502103 --go
Formatting partition 2 BCT please wait.. FAILED!
command failure: create failed (bad data)
bootloader status: partition table is required for this command (code: 8) messag
e: nverror:0x5 (0x1000005) flags: 0
used babsector and it worked
got back into recovery mode

Been there
Been there (I think I have a messed up reset button actually), but the only thing I can get my tablet back to life on is timmyDean´s root-3.2.1-V4.7z find in the forums extract the files then in the image folder you will find nvflash run the flash.bat but it reformats your flash etc. and brings you back to HC 3.2.1.
I have been through all of the tools and this was the only one that boots to android when its finish, which I need since I think my reset is stuck.
I needed to create ubuntu usb stick and run eppe's code to get my CPUID might help with usb connection issues to use similar too.
Then I was working with nvflash --read and the v8 bootloader stuff (since before my tablet soft bricked I was OTA ICS full stock), and was able to read off my user data with nvflash partition before I did the flashing. That way I saved all of my tablet pictures and video etc. (loop mounted the image read from that partition in ubuntu and was able to pull out any of my user data).
To get my data I used V8-UNL-ICS-HC-bootloader-MULTI-cwm.zip see more at http://forum.xda-developers.com/showthread.php?t=1622425
Then I did:
nvflash --bct bct.bct --setbct --bl bootloader_apx.bin --configfile flash.cfg --odmdata --sbk %MYSBK% --sync
nvflash --resume --read 2 mybct.bct
nvflash --resume --getbct
nvflash --resume --getpartitiontable mypartitiontable.txt
nvflash --resume --read 13 UDA_raw3.img
I wish I would have backed up all of my partitions that way but I think I will get the replacement part first and then rebuilt the tablet.
Hope that helps

Thanks
What I ended up doing was creating and formatting partitions with Babsector - as opposed to Badsector, which didn't work
The used A500 APXflash
Then installed Jellytime X
The Jellytime was not working properly so I used root-3.2.1 V4 to take it back to 3.21, then OTA to 4.0.1
Root it again and then I stopped.. think I will stay with this rom, until 4.2 is super stable.
I think I did this procedure about 4 times in 2 days, as every rom that I tried either trashed the partition or boot loader, or didn't run properly.
I was lucky as I used afterOTA as part of flash the bootloader, and it saved a txt file with all my cpu info...

David_h99 said:
Thanks
What I ended up doing was creating and formatting partitions with Babsector - as opposed to Badsector, which didn't work
Click to expand...
Click to collapse
What do you means by that? what is this babsector?
HOw do you creating and formatting partitions with Babsector?
I had try badsector and it doesn't work so if you have another way to do it i am very interested!
thanks

you can get babsector here
narod.ru/disk/53919831001.a235ea2225f319015f30c009629d2075/BabSector.rar.html
Make sure your computer sees tablet in APX mode, and the driver in device manager is the ACER USB driver
Then read info on how to run babsector

[Q] Need Help Recovering - Driving Me Crazy

I have flashed a lot of stuff, but this Iconia is driving me CRAZY.
For starters, the tablet will only boot into APX mode when you turn it on. Blank screen, but the power light is white/blue.
I DO have the SBK, which I grabbed through Ubuntu.
I try using the blackthund3r utility. It detects it in APX mode fine and pops it into the bootloader, but after that it gets stuck. This is at "Flashing Bootloader (EBT) stage two - uploading image..." The command prompt just displays Nvflash started [resume mode].
When I try running v8.bat manually from the command prompt, I usually get a lot of failed command errors which come at different points at times.
The other day I miraculously used the blackthund3r utility and handpicked some bootloader and system files and got it to boot back into Android, but when it tried updating OTA it got stuck on reboot saying the "blob update failed." Now I am back to the start of this post.
I've updated the drivers a few times and also installed the Android SDK. Everything is up to date.
If anyone has any idea what might be holding me up I could use the help. My girlfriend is mad now that I have re-destroyed her tablet after bringing it back to life and I need to get it back to her.

Have you tried using Ubuntu to run the nvflash commands, some have had luck with it where windows won't....
Srbeens guide (its stickied in the general forum) to recovering sbk via Ubuntu also has a few steps in running the nvflash commands directly from Timmy deans v4 EUU which is used to repair partitions, there might be something there u can use...
Sent from my GT-I9300 using Tapatalk 2

dibb_nz said:
Have you tried using Ubuntu to run the nvflash commands, some have had luck with it where windows won't....
Srbeens guide (its stickied in the general forum) to recovering sbk via Ubuntu also has a few steps in running the nvflash commands directly from Timmy deans v4 EUU which is used to repair partitions, there might be something there u can use...
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
This is working for me up to the same point. I'm getting a "sync failed (bad data)" error and I can't format any partitions.

erndixon said:
This is working for me up to the same point. I'm getting a "sync failed (bad data)" error and I can't format any partitions.
Click to expand...
Click to collapse
k, hopefully its just your partitions messed up and not the dreaded hardware failure... you got couple options left and both of these will work from apx mode
timydeans v4 an EUU based tool which will give you a pre-rooted stock HC3.2 and cwm installed too - it will wipe everything
heres how user lcd047 went about it on his a501 but will work for a500
lcd047 wrote:
"I downloaded timmyDean's root-3.2.1-V4.7z
I booted the tablet (in APX mode) and I connected the USB cable to it
in the directory root-3.2.1/Image I run the command
nvflash --bct flash.bct --setbct --odmdata 0x100c0105 --configfile flash.cfg --create --bl bootloader.bin --sbk (your sbk number after converting your UID number) 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX --go
without rebooting, I flashed the v7 bootloader and recovery as per the bootloader thread; since the partition table was restored at the previous step, the operation now succeeded;
I rebooted the tablet in recovery, and proceeded to wipe the data and flash a ROM the usual way.
And that worked for me. After flashing, my a501 did a automated reboot, i quickly killed the reboot by holding the Power Button (guessing killing the reboot is not realy necessary because the booting shouldn´t mess up the partition table again) and then brought the devive back to APX Mode (Holding Reset and Power for 3-4 sec. then releasing Power and after 1 second relesaing Reset).
Then i flashed the hacked bootloader via blackthund3rs APX flash tool (see link above).
Then i installed Alexandra V as Moscow Desire descirbes (see "To Install" at http://forum.xda-developers.com/show....php?t=1635577)
It took my 2 days of trial and error, but finaly give me a nice working Alexandra ROM on my a501!
Click to expand...
Click to collapse
The other way is by using the "babsector.rar" from the russian forums -
you can download it http://forum.xda-developers.com/showthread.php?t=2049778, theres a couple of good links in post 13 of that same thread on how to use it correctly
You don't say which rom was on the tab previously - so once the partitions are repaired and you've run the unlocked bootloader flash you'll need to immediately boot to recovery and flash an ics/jb rom ...do not try booting into android until you have done this....else you'll need to do everything all over again!!!

dibb_nz said:
k, hopefully its just your partitions messed up and not the dreaded hardware failure... you got couple options left and both of these will work from apx mode
Click to expand...
Click to collapse
Very helpful threads. Exactly the problems I was facing. Using the babsector a501a commands, I am getting a "create failed: (bad data)" and "bootloader status: fatal failure to read/write to mass storage" errors right after it creates the partitions. I am guessing that it is probably faulty memory then and it just can't write to it no matter if I am doing it correctly or not. Thanks for all your help.

erndixon said:
I am guessing that it is probably faulty memory then and it just can't write to it no matter if I am doing it correctly or not. Thanks for all your help.
Click to expand...
Click to collapse
try this: http://forum.xda-developers.com/showthread.php?p=49951540

[GUIDE] Nvflash-ICS Restore

Nvflash-ICS Restore!
This guide will not provide information to install Nvflash-ICS as that is covered well elsewhere.
Once you have read the information on that page click Guide.
All necessary partitions are backed up with Nvflash and you can restore only the ones necessary to recover your unit.
The second method to restore has been removed until further study can be done!
If your problem can't corrected using this information and normal use of recovery, adb, and fastboot go to this post to access the IRC channel for all Asus transformers using nvflash.
I have finished installing Nvflash but where are my files?
/sdcard/AndroidRoot/ - this is your internal sdcard
Click to expand...
Click to collapse
What files should I have?
blob.bin
blob.txt – the extension on this file varies
bootloader.ebt
create.bct
recovery.bct
bricksafe.img
factory-config.img
unlock-token.img
Click to expand...
Click to collapse
Nvflash recovery and going back to ICS for a fresh start.
Use blobunpack to unpack a stock ICS blob. The blob is found by unzipping the stock ICS firmware twice.
You can find the ICS firmware at this link (9.4.3.30) (post #3).
[INDEX][18 April 2013]TF300T & TG-INDEX of Roms/Dev Guides/Kernels/Recoveries/etc.
Please give philos64 a thanks while there, without him you would have a very hard time finding these downloads if at all.
these files have to be in the folder with Nvflash
wheelie -r --blob blob.bin -created with Nvflash install
nvflash --resume --download 4 blob.EBT -created with blobunpack
nvflash --resume --download 10 blob.APP – created with blobunpack
nvflash --resume --download 6 blob.LNX – created with blobunpack
nvflash --resume --download 5 recovery.img-ICS twrp recovery image name
nvflash --resume --go
then press volume down to enter twrp, flash root, flash rom or whatever you wish
Click to expand...
Click to collapse
If your problem can't corrected using this information and normal use of recovery, adb, and fastboot go to this post to access the IRC channel for all Asus transformers using nvflash.
What is blobunpack?
Here are some links to download and explain use.
https://github.com/AndroidRoot/BlobTools
windows compiled blobtools - http://forum.xda-developers.com/showpost.php?p=21620550&postcount=24
see post #7 for info - http://forum.xda-developers.com/show....php?t=1068548
There were no dates for the following information.
The current AndroidRoot.mobi bootloader versions are
Transformer Prime: 9.4.2.28r01
Transformer TF300: 9.4.3.30r01
Transformer TF700:9.4.5.30r01
ChangeLog:-
Patch: Enable ‘fastboot boot’ command (removes ‘fastboot continue’, use ‘fastboot reboot’ instead).
Patch: Force unlocked state (protect your unlock status no matter what happens to your token).
Patch: Remove blob requirement from ‘fastboot flash’ (Flash the raw images (example: ICS_recovery.img) and not blob files).
Click to expand...
Click to collapse
When failing to get into APX mode you can try the following suggestions.
Special thanks to wha2do and daws for their input!
Also wha2do has posted a guide to enter APX that provides detail not found here! Please see his guide and give proper thanks if you find it helpful!
http://forum.xda-developers.com/show...3#post36159253
1.To enter APX mode you either have to boot, choose reboot (if available) and hold volume up pressed until it reboots and then the screen should remain black. Or if that doesn't work, completely shutdown your tablet and wait a second or two and then hold volume up pressed while pressing power on and keep it pressed until screen is blank.
or
2.fastboot -i 0x0B05 reboot (hold volume up)
or
3. adb reboot (hold volume up)
or
4. with unit powered on hold volume up and press reset with paperclip - (don't press hard)
reset is located about 25mm or 1in below the sdcard
or
5. su
reboot -hold volume up.
This is done using a terminal; Android terminal is free from the play store. You must be rooted for this to work.
or
6. Another way:- Provided by daws
Power off the tablet and don't touch the power button again.
Connect USB cable to tablet but not to PC yet.
Press volume up and then connect USB cable to PC.
Wait a few seconds before releasing volume up button.You should now be in APX mode.
Thanks for the help daws.
or
Only if there is no other resort!
7. remove cover from unit, disconnect battery, press and hold volume up, reconnect battery!
Click to expand...
Click to collapse
Good Luck!
Click to expand...
Click to collapse

Due to my dock smoking my motherboard I have purchased a new motherboard and luckily it came as 4.0.3 ICS.
I now have installed and use Nvflash on my tablet.
In case anyone is interested this is the unit I purchased.
The box shows - Manufacturer's Reconditioned Parts - 90 Day Limited Warranty.

Usefull guide
Good work and helpfull guide for xda members :good:
Nice stuff

philos64 said:
Good work and helpfull guide for xda members :good:
Nice stuff
Click to expand...
Click to collapse
Thank you for your kind words.

can I use these file
blob.bin
blob.txt – the extension on this file varies
bootloader.ebt
create.bct
recovery.bct
bricksafe.img
factory-config.img
unlock-token.img
from other tf300t to unbrick my tf300T bricked ver 4.1.2.?.

chanhny said:
can I use these file
blob.bin
blob.txt – the extension on this file varies
bootloader.ebt
create.bct
recovery.bct
bricksafe.img
factory-config.img
unlock-token.img
from other tf300t to unbrick my tf300T bricked ver 4.1.2.?.
Click to expand...
Click to collapse
No.
The files contain device-specific keys and cannot be used for other devices.
See the original thread for details:
[DEV][TOOL][BRICKPROOF]TF300 NVFlash release!

There's something I've not been quite clear about with NVFlash.
So I do my backup and keep my files.
Afterwards I upgrade to Jelly Bean (because I need the JB bootloader for ROM's right?), put TWRP recovery on, and flash a new ROM that uses the bootloader version I have.
So now I have the JB bootloader, can I still enter APX mode and do a restore, or do I have to remain on ICS bootloader to do a restore?
Is NVFlash truly unbrickable? A glance at this forum shows loads of bricks, would this have sorted their problem if they backed-up first?
Thanks!

tobdaryl said:
This guide will not provide information to install Nvflash as that is covered well elsewhere.
Once you have read the information on that page click Guide.
All necessary partitions are backed up with Nvflash and you can restore only the ones necessary to recover your unit.
I have finished installing Nvflash but where are my files?
What files should I have?
Nvflash recovery and going back to ICS for a fresh start.
What is blobunpack?
Caution
Caution
There were no dates for the following information.
When failing to get into APX mode you can try the following suggestions.
Caution
Full brick recovery
Caution
Good Luck!
Click to expand...
Click to collapse
I played around with your instructions today. Ran into 2 snags:
1. Using blob UI, I typed "u" for unpack, then "blob." It returned with "cannot open 'b'";
2. Typed blobunpack.exe blob. Gave me all the files as shown in attached thumb, except LNX. Where did I go wrong?

graphdarnell said:
I played around with your instructions today. Ran into 2 snags:
1. Using blob UI, I typed "u" for unpack, then "blob." It returned with "cannot open 'b'";
2. Typed blobunpack.exe blob. Gave me all the files as shown in attached thumb, except LNX. Where did I go wrong?
Click to expand...
Click to collapse
I'm having problems with the UI myself. It worked properly when posted. We probably have had an update that broke the UI. I'll remove the link. The tools are easy to use without the UI.
You don't have an LNX extension but you do have boot.img which is the same partition. Did you possibly rename the file and forget? Packing and repacking are still working properly for me including LNX.
I also updated the download link. The link now shown is for the version that can sign when blobpacking.

tobdaryl said:
I'm having problems with the UI myself. It worked properly when posted. We probably have had an update that broke the UI. I'll remove the link. The tools are easy to use without the UI.
You don't have an LNX extension but you do have boot.img which is the same partition. Did you possibly rename the file and forget? Packing and repacking are still working properly for me including LNX.
I also updated the download link. The link now shown is for the version that can sign when blobpacking.
Click to expand...
Click to collapse
Not really. I didn't touch it. I'll do it again today to see. Thanks for the reply.

No recovery
Hello Everybody,
I followed the instructions to restore my device however when my tf300t reboots I can't get the device into recovery mode. It will start up into android or if I hold the volume down during restart it says "platform pre os boot configuration cold booting linux". I download a ICS twrp img recovery file from here for the tf300t. "http://techerrata.com/browse/twrp2/tf300t"
My only options at this point are to enter APX mode or boot into android.
If somebody could help me install a recovery so I can use custom roms I would appreciate it!!!!!
Thanks,
Mike

waynestatemac said:
Hello Everybody,
I followed the instructions to restore my device however when my tf300t reboots I can't get the device into recovery mode. It will start up into android or if I hold the volume down during restart it says "platform pre os boot configuration cold booting linux". I download a ICS twrp img recovery file from here for the tf300t. "http://techerrata.com/browse/twrp2/tf300t"
My only options at this point are to enter APX mode or boot into android.
If somebody could help me install a recovery so I can use custom roms I would appreciate it!!!!!
Thanks,
Mike
Click to expand...
Click to collapse
Use nvflash again to flash only twrp.
or
Other options
fastboot -i 0x0B05 flash recovery twrp.blob
fastboot -i 0x0B05 reboot
or if rooted
adb shell
su
dd if=/sdcard/twrp.blob of=/dev/block/mmcblk0p4 Then reboot to complete installation.
adb reboot
I use 2.5.0.0 twrp as I have problems with 2.6.0.0.

tobdaryl said:
Use nvflash again to flash only twrp.
or
Other options
fastboot -i 0x0B05 flash recovery twrp.blob
fastboot -i 0x0B05 reboot
or if rooted
adb shell
su
dd if=/sdcard/twrp.blob of=/dev/block/mmcblk0p4 Then reboot to complete installation.
adb reboot
I use 2.5.0.0 twrp as I have problems with 2.6.0.0.
Click to expand...
Click to collapse
Thanks tobdary for replying back. I tried other versions of the recovery but none seem to work. I can't do that fastboot method because I dont get the fastboot option when the I hold the volume down and power like I did when the tablet was bone stock. I can't get su access on the tablet because its not rooted anymore once I reinstalled the nvflash rom so I cant try and flash recovery that way either. I'm really stuck and not sure why this isn't working!
Thanks,
Mike

waynestatemac said:
Thanks tobdary for replying back. I tried other versions of the recovery but none seem to work. I can't do that fastboot method because I dont get the fastboot option when the I hold the volume down and power like I did when the tablet was bone stock. I can't get su access on the tablet because its not rooted anymore once I reinstalled the nvflash rom so I cant try and flash recovery that way either. I'm really stuck and not sure why this isn't working!
Thanks,
Mike
Click to expand...
Click to collapse
I'm not sure either.
Try flashing stock recovery and recheck your bootloader menu for fastboot.

tobdaryl said:
I'm not sure either.
Try flashing stock recovery and recheck your bootloader menu for fastboot.
Click to expand...
Click to collapse
Do you know where I can find the stock recovery? Is it something ziped in the original rom file?
I was able to root the tablet using a program that that uses a exploit while android is running. I then could adb through su access and flash different twrp recovery blob files to the tablet. Though the tablet rebooted and showed a blue line with recovery being installed when I restarted I have no options to load recovery, fastboot, or linux. I'm thinking the bootloader is corrupt. I own a tf201 and might have accidentally used one of the hairybean 2.3 (4.2) bootloader updates for that device on this one. Is there a way to get my bootloader back to the original and maybe that will fix it?
Thanks,
Mike

waynestatemac said:
Do you know where I can find the stock recovery? Is it something ziped in the original rom file?
I was able to root the tablet using a program that that uses a exploit while android is running. I then could adb through su access and flash different twrp recovery blob files to the tablet. Though the tablet rebooted and showed a blue line with recovery being installed when I restarted I have no options to load recovery, fastboot, or linux. I'm thinking the bootloader is corrupt. I own a tf201 and might have accidentally used one of the hairybean 2.3 (4.2) bootloader updates for that device on this one. Is there a way to get my bootloader back to the original and maybe that will fix it?
Thanks,
Mike
Click to expand...
Click to collapse
The first thing you flash in this guide is the bootloader. nvflash --resume --download 4 blob.EBT
With nvflash you can flash only what is needed for your situation. If you feel the problem is the bootloader you can flash just that and try again.
What you describe sounds like stock recovery is still working on your tablet. If flashing the bootloader does not help I would use stock 9.4.3.30, unzip once and place the remaining zip on your internal sdcard. You may get an update notification. Accept it and let your tablet do the work. If you don't get the notification reboot your tablet and you should see it then. Doing this will write stock bootloader, recovery, etc.
Stock recovery is the blob.SOS when you blobunpack. Just use the stock 9.4.3.30 blob and use the resulting SOS (recovery.img).

TF300T Bricked accessible using APX Mode.
Hello @tobdaryl
I have read your thread fully, but my case differs a little bit and need your advice:
I have unlocked ASUS TF300T.
I cant access FastBoot or ADB.
I can access the APX mode.
The ASUS shows only the ASUS logo when powered on.
I don't have BackUp of anything.
I have flashed everything from my ASUS, even the recovery. (I was novice):angel:
Any suggestions or advices please?
What should i do and from where shall i get the needed files, etc...
Thank you in advance.
Nader H.AL-Dirany

NaderALDirany said:
Hello @tobdaryl
I have read your thread fully, but my case differs a little bit and need your advice:
I have unlocked ASUS TF300T.
I cant access FastBoot or ADB.
I can access the APX mode.
The ASUS shows only the ASUS logo when powered on.
I don't have BackUp of anything.
I have flashed everything from my ASUS, even the recovery. (I was novice):angel:
Any suggestions or advices please?
What should i do and from where shall i get the needed files, etc...
Thank you in advance.
Nader H.AL-Dirany
Click to expand...
Click to collapse
I have read your previous posts in addition to this one.
There are four vehicles to restore your tablet. (some things can be done within android but you have no access)
1. recovery - stock or twrp
2. fastboot
3. adb
4. nvflash
I notice you also posted in my guide for accessing adb, fastboot, and apx. You were unable to access fastboot, adb, or recovery with those methods.
I don't know of any way to recover through apx without nvflash previously installed and you have no access to the other three methods.

Needs Stickied ... thanks man you helped save my butt :good:

Trigger911 said:
Needs Stickied ... thanks man you helped save my butt :good:
Click to expand...
Click to collapse
Thanks! *I'm glad you found the info useful.