hi all
i'm beginner in android, i hardly downloaded rom for my iconia, however.
during installing a program on my Acer iconia tab A500 suddenly stopped working, and i couldnot boot it with (black screen written on it acer + with message on the upper left corner of the screen says : secure boot: image lnx checksum fail!)
i read a little about that
1- i tried power+volume down but not working.
2- tried reset but not working.
3- tried adb but not working, its not in debug mod.
4- tried euu but not working ido not have my UID.( is it written on the ouside package.
5- tried to have my uid through usbdeview but there is no memory for previous thethering
6- tried wipe it to factory without recovery but not working
istill have the same fail message
note:
i had done a full backup previously to this problem with clockworkmod contains boot recovery and...
however
could you please help.!!
thanks in advances
Can you boot into recovery by holding down the volume down button and depressing the power on button?? If you can, once in clockworkmod recovery you need to select the "fix a500 boot/recovery checksums" under the advanced menu. It should have done this first time you booted into recovery to install a rom or when you rooted and installed cwm. Good luck, and once you get it fixed install the latest cwm recovery that is located on tegraowners.com.
Make sure you try volume up and down to get into recovery since it isn't very intuitive on which button is up and which is down.
Sounds like you have CWM loaded which has a tool to fix checksums. You boot to recovery mode using power * volume+ and then in the Advance menus is a item to fix your problem.
TD
I had the same issue a while back. If you do not have CWM installed, you should revert back to a 3.0.1 original ROM. I am not sure if 3.0.1 is required, but the original ROM from acer has a Windows Flash utility, so the tab is flashed using a PC, not the recovery mode from the tab itself.
It was a while back (before this summer), but i can't exactly remember if my tab already had CWM or ROOT.
I know there is/was a thread about reverting to 3.0.1 somewhere on XDA, but i can't seem to find it anymore.
Boot to recovery. Hold vol- and pwr until text appears at the upper left corner of the display.
Can you do that? And get the menu?
Say exactly what you did, with filename. All procedures you did.
We are missing information.
acer a500 usb boot recovery driver in the window 7 device manager disappear when entering download mode using blackthund3r a500 apx flash utility have tried about 10 times with no luck
shenny585 said:
acer a500 usb boot recovery driver in the window 7 device manager disappear when entering download mode using blackthund3r a500 apx flash utility have tried about 10 times with no luck
Click to expand...
Click to collapse
Follow along with this step by step - "Pictorial" "How to Use the apxFlash Tool"
how far do you get and what doesnt 'work'?
Did you install the right drivers?
apx flash utility
I got as far as are you ready to flash I press yes when downloading starts the driver disappears. I tried the manual method and auto mathod. I used the guide an followed it
a500 flash utility
yes it is the right driver. download it from the acer a500 support site
You should see a cmd prompt come up and load a few lines up then flash off the screen. At that point your tab should vibrate and say sumthin like "Entering Acer Download mode" with the acer logo in the middle.
I don't remember if mine disappeared or not, I know I kept an eye out for it the first time I flashed the BL. I read this after I flashed to v4, I would have checked had I read it earlier...sorry
As long as the little usb icon appears at the bottom of the screen it should be OK. Make sure you don't have any other usb devices attached... Right click on the usb icon and it should say apx device...
I always use manual method to update bootloader and recovery as I can't seem to get blackthund3r's tool to work....
You do need to be in APX mode though... Supposed to be tricky manually but I just stick a LED leg into the reset hole, press power 3 secs then a sec later release the reset button. Works every time...
shenny585 said:
I got as far as are you ready to flash I press yes when downloading starts the driver disappears. I tried the manual method and auto mathod. I used the guide an followed it
Click to expand...
Click to collapse
ok we wont be too concerned with the driver disappearing just yet...
you get the are you ready to flash window and click yes
then the you have 8 seconds to cancel window pops up
and then the "flashing ....entering download mode bootloader pops up
so what do you see after clicking yes to the are you ready window
also what rom are you on now and which package are you trying to flash??
apx flash utility
I see entering dowload mode bootlander- flashing boot loader-flashing kernel-flashing recovery-exiting bootloader
package-V3 bootloader
rom- ICS AV041 a500_1.031.00_ww_Gen1
shenny585 said:
I see entering dowload mode bootlander- flashing boot loader-flashing kernel-flashing recovery-exiting bootloader
package-V3 bootloader
rom- ICS AV041 a500_1.031.00_ww_Gen1
Click to expand...
Click to collapse
yep - nothing wrong there
ok lets take another step back
- apart from the driver disappearing do you have any other problems????
cos to me it doesnt seem that you do????
- so what happens on your tab that u dont or do see in the guide??
apx flash utility
Reading the guide again I notice the tab does not vibrate but the screen say
"Entering Download Mode"
shenny585 said:
Reading the guide again I notice the tab does not vibrate but the screen say
"Entering Download Mode"
Click to expand...
Click to collapse
Lol, m8 U ain't making this easy for me r u??.
Put it this way then,
Do u have a problem, cos I'm not hearing one . Does the tool fail to flash woteva it is u r trying to flash, does it get stuck and go no further, does yr tab not boot or something ...is the guide wrong,...I dunno???
So there aren't a lot of steps left to go - download mode u got OK, flashing u got OK, assume got "Done" window
So, either u still on v3 and u wanted v4 OR..............
The tool does not flash anything, another thing I notice in the guide the power light stays on, by the way I noticed at bottom of the tool it says apx decvice is connected.
shenny585 said:
The tool does not flash anything, another thing I notice in the guide the power light stays on, by the way I noticed at bottom of the tool it says apx decvice is connected.
Click to expand...
Click to collapse
OK now we're cooking...... everything you've said you've done and seen is all OK ant there should be no reason why the flash hasn't worked....
U posted this earlier "package-V3 bootloader rom- ICS AV041 a500_1.031.00_ww_Gen1"
Is this what u wish to flash to?
You've chosen not to flash custom recovery, is that correct..?
There is an updated version But its not mandatory you have it. you will be alright on v3
-A500-V4-CWM1.7.a500apx or
-A500-V4-CWM1.7.2.a500apx with latest CWM-1.7.2
Download Acer recovery installer if u dont already have it.
open it up and tell me what BL & Recovery version it says u have
Silly question maybe, but are rooted??
apx flash utility
Yes I have not chosen to flash custom recovery
Yes I am rooted
Acer Recovery Installer:
BL-0.03.12-ICS
Recovery Version-CWM rev1.7 by thor2002ro(for ICS Bootlloader)
The problem here is when a boot into recevery. I get (recovery verified failed ) after I updated to new ICS OTA that when the error started.
Used the Acer Recovery Installer and Power Bottom-Vol-Down same results.
shenny585 said:
Yes I have not chosen to flash custom recovery
Yes I am rooted
Acer Recovery Installer:
BL-0.03.12-ICS
Recovery Version-CWM rev1.7 by thor2002ro(for ICS Bootlloader)
The problem here is when a boot into recevery. I get (recovery verified failed ) after I updated to new ICS OTA that when the error started.
Used the Acer Recovery Installer and Power Bottom-Vol-Down same results.
Click to expand...
Click to collapse
M8, that took along time to get to the real problem and is what u should have posted right from the beginning!!!!!
The OTA has wiped yr cwm recovery and root - Yes that's just what they do
You've re-rooted - OK fine
Problem - recovery verified failed after OTA update
U have tried to fix using apxFlash - but chose not to flash a custom recovery (CWM)
Your recovery is borked so u have to put a new one on there, the best way to
go about doing this is to:
Download the V3 AND CWM Recovery package and apxFlash that.....Done!!
your need to flash the WHOLE PACKAGE b/c ARI reports yr BL as plain old stock
You cannot replace the failed recovery with CWM with the plain old stock BL!!
You have to flash the patched BL as well, so again
You must flash the whole pckg just like in the guide OK
if later u want the stock recovery back u can use ARI to do that but after the apxflash!!!
apx flash
Thanks for all your help but I can't seen to find the { V3 bootloader AND CWM Recovery package } that you mention. Can you lead me the right place for the files.
Thanks
Can I jump in here please as its sort of my problem as well.
Every thing goes fine ish.
When the tool tries to boot the tab into bootloader it fails.
Nothing on the tab screen. USB icon or computer disappears.
I just want to install a ics unlocked (is that the same as pateched) boot loader so I can install civs extreme???
Thanks
Why don't you guys read this thread.
http://forum.xda-developers.com/showthread.php?t=1688795
And install your Google USB drivers and verify they work with your tab in APX mode.
Later in the thread I posted an older app which installs Ver4 unlocked and CWM. Read the notes on my post's and give it a shot.
It's the app I always use.
MD
Okay. Rooted the A500 this afternoon... got ready to flash the first step from blackthund3r's APX Flash Utility... I have the drivers, up to date, and clicked "No" to go back and get them (accidentally) and now it is sitting still saying "Acer Iconia APX Mode" in the upper left screen in white text with a nice green ACER logo in the middle, but it isn't doing anything and the APX tool says "Waiting for 4 seconds for the tablet to enter the bootloader", but the tablet is not entering such a bootloader... What now?
Can someone please help or toss me some suggestions on how to unbrick my tablet without sending to acer if possible this is whats goin on. It was rooted and running fine with CWM 1.7.3 from thor then the other day i turn it on and bootloop at bootanimation. i then enter recover to wipe and flash as usual but when i goto wipe it says error removing /data/data/com.android........... I heard my data partition was corrupted and proceeded with trying to really format that to no avail fearing my tablet was bricked i followed another thread titled how to unbrick your tablet!!!! it installed OTA ICS and wiped my recovery :crying: so now i have stock recovery and bootloop and the pc still recognizes the tablet in fastboot and APX mode but when i try to format /data in fastboot it says bootloader locked :crying: and when in apx mode when i try to use nvflash it says error during usb write then it says usb device not connected until i restart apx mode fresh. in the stock recovery it will flash OTA packages and finish install but still stuck in bootloop otherwise i just get the dead android guy with a red exclamation point. Any help or suggestions would be greatly appreciated.
JLow0214 said:
Can someone please help or toss me some suggestions on how to unbrick my tablet without sending to acer if possible this is whats goin on. It was rooted and running fine with CWM 1.7.3 from thor then the other day i turn it on and bootloop at bootanimation. i then enter recover to wipe and flash as usual but when i goto wipe it says error removing /data/data/com.android........... I heard my data partition was corrupted and proceeded with trying to really format that to no avail fearing my tablet was bricked i followed another thread titled how to unbrick your tablet!!!! it installed OTA ICS and wiped my recovery :crying: so now i have stock recovery and bootloop and the pc still recognizes the tablet in fastboot and APX mode but when i try to format /data in fastboot it says bootloader locked :crying: and when in apx mode when i try to use nvflash it says error during usb write then it says usb device not connected until i restart apx mode fresh. in the stock recovery it will flash OTA packages and finish install but still stuck in bootloop otherwise i just get the dead android guy with a red exclamation point. Any help or suggestions would be greatly appreciated.
Click to expand...
Click to collapse
Have you tried installing the patched bootloader? Remember, you have to have your SBK number you got from your UID. I found that NVFlashing using one of the earlier releases works best for me.
Also remember what OTA update.zip you are installing. Some of them, are just update patch files, which require a specific OS to be installed.
Did you try this thread?
http://forum.xda-developers.com/showthread.php?t=1699277
Basically, you decrypt the 2 update files, extract the contents of one on to your SD card. Try booting to stock recovery and see if it installs and boots.
If that doesn't work, then do the same with the other update file.
The 50x is basically bullet proof. There is always a method, and sometimes, it's finding the method that works is the hardest.
MD
I did finally get it. I let it bootloop hooked it up to my pc and used adb while it was bootlooping to get my cpuid and sbk since i had neither of those i couldnt do jack with nvflash. After i got those went back in apx mode flashed bootloader and cwm again followed thors instructions on how to really format data partition and installed rom like normal. Worked like a champ, but without cpuid and sbk i woulda never fixed it
Sent from my Iconia A500 using Tapatalk
i can't enter in recovery mode at all.
Either i see an android with red triangle or i see the message recovery verified failed
i have ACER_AV041_A500_1.031.00WW_GEN1
ICS 4.0.3
KERNEL V.2.6.39.4+
IMAGE VERSION ACER_AV041_A500_RV03RC01_WW_GEN1
antonismarios said:
i can't enter in recovery mode at all.
Either i see an android with red triangle or i see the message recovery verified failed
i have ACER_AV041_A500_1.031.00WW_GEN1
ICS 4.0.3
KERNEL V.2.6.39.4+
IMAGE VERSION ACER_AV041_A500_RV03RC01_WW_GEN1
Click to expand...
Click to collapse
Were you running a custom CWM recovery before? Just curious.
Try this thread....
http://forum.xda-developers.com/showthread.php?t=2482766
See if it'll install one of those packages.
MD
Hi,
I was on stock bootloader and stock OTA 4.03 ICS rom. I wanted to upgrade to jellybean rom from tegraowners. I am now stuck in recovery mode.
Here are the steps i did.
1) rooted my A500 succesfully
2) With the Blackthunder APX flash tool i flashed in auto mode the Skrilax_CZ V8 bootloader (with multiboot) also succesfully.
3) Then i flashed with ADB.exe the 1.8.1 Touch recovery image that also went well and succesfully flashed it.
4) Booted in recovery mode and wiped data.
5) Went to install from external zip the latest jellybean rom from tegraowners wich is ofcourse on my sd card.
6) It started to formatting my system partition ( i think it was on 7%) and then it suddenly restarts my tab.
Now the only thing i have is power + -VOL is my recover mode and power + +VOL is my other menu i have wich contain the fastboot menu.
From there i am stuck and don't know what else i can do.
I do have my UID number and SBK.
Here is a screenshot of what i have in recovery mode:
Thanks and hopefully someone can help!
You will have to do a "real" data format. And for more help with ROMs from "other" forums you should ask on those "other" forums.
You will find the moderators here do not condone those "other" ROMs.
Perform a real format, then flash a ROM again (you'd better go to Tegraowners.com for more support), but if the problem persists then it may be a bad download, which means you have to download and flash your recovery again. However at TegraOwners you can also find the latest TWRP recovery.