Database Users

Boot loop came from nowhere!

My tf300t decided to randomly shut down last night and its got stuck in a boot loop. It shows the first Asus logo in white, and then the second in the animated grey/silver but then goes black and goes back to the first white Asus logo.
I let it do this all night, unplugged so it ran it self out of battery, because there was nothing k could do!
I tried booting into recovery mode (vol down + power) to see what options are available and it gives a 10 second countdown saying it will boot normally of anything is pressed, so i can't do anything from recovery mode either it seems.
Please can someone suggest how to boot into a working tablet as its only a week old
Sent from my GT-I9300 using xda app-developers app

I should also add that I am completely stock. Installed the .18 ota a few days ago also.
Sent from my GT-I9300 using xda app-developers app

Have you tried doing a wipe? Vol down + pwr button to enter bootloader screen then move selector to "wipe" via volume buttons (Mine work opposite to the instructions at the top of the screen. I.E. where it says use vol up I have to use vol down instead). Note this will erase everything on your internal sd card and reset to factory settings etc. If you need to get some files off prior to wiping select the USB logo from the bootloader screen and connect to a PC to see if you can access them first. Hope this helps! Good luck!
Sent from my ASUS Transformer Pad TF300T using xda app-developers app

How to restore bricked A501?

Hello everyone, i have a Iconia Tab A501 and i can't get it to work.
When i power it up it just hangs on the Acer logo. I can enter in recovery, but any rom (i tried 3 of them) that i try to flash doesn't work. The green android with the rotating 3d-thing is there but after a few seconds it's gone and at his place there is another android with the open belly and the red warning symbol.
I can't flash it because i don't have the cpuid. The bootloader is locked. What can i do?

edocod said:
Hello everyone, i have a Iconia Tab A501 and i can't get it to work.
When i power it up it just hangs on the Acer logo. I can enter in recovery, but any rom (i tried 3 of them) that i try to flash doesn't work. The green android with the rotating 3d-thing is there but after a few seconds it's gone and at his place there is another android with the open belly and the red warning symbol.
I can't flash it because i don't have the cpuid. The bootloader is locked. What can i do?
Click to expand...
Click to collapse
Sorry if this is a bit late. I'm not sure if this will work for a Iconia A501(I have A500), but you can try a hard reset.
To do this, power off, hold down volume UP(not down like to enter recovery), power up, then toggle the screen lock switch back and forth (I believe you can release the power button while doing this, just keep holding to volume control) This should equate to a factory reset(I've never done it, so I'm not sure). If it doesn't work try it again(apparently it takes a few tries)
Hope this helps!

CurtisMJ said:
Sorry if this is a bit late. I'm not sure if this will work for a Iconia A501(I have A500), but you can try a hard reset.
To do this, power off, hold down volume UP(not down like to enter recovery), power up, then toggle the screen lock switch back and forth (I believe you can release the power button while doing this, just keep holding to volume control) This should equate to a factory reset(I've never done it, so I'm not sure). If it doesn't work try it again(apparently it takes a few tries)
Hope this helps!
Click to expand...
Click to collapse
It doesn't work. It turns on showing the acer logo and hangs.

It's probably done the same as mine, died permanently. Nothing you can do about it. It's most likely that the mmc is broken or has become unsoldered. Sorry but I suspect it's toast.
Sent from my GT-N8000 using Tapatalk HD

edocod said:
It doesn't work. It turns on showing the acer logo and hangs.
Click to expand...
Click to collapse
How long did you wait? It takes some time to boot up first time. If you still have issues you can try force it into APX mode and flash the bootloader and recovery again, then reflash the stock ROM in recovery. http://forum.xda-developers.com/showthread.php?t=1619913
Or it could be completely dead like zardoz99 says. That would seriously suck.
EDIT:
Read again. Y U HAVE NO CPUID!?

CurtisMJ said:
How long did you wait? It takes some time to boot up first time. If you still have issues you can try force it into APX mode and flash the bootloader and recovery again, then reflash the stock ROM in recovery. http://forum.xda-developers.com/showthread.php?t=1619913
Or it could be completely dead like zardoz99 says. That would seriously suck.
EDIT:
Read again. Y U HAVE NO CPUID!?
Click to expand...
Click to collapse
I waited all the night.
The tablet isn't mine so i don't have the CPUID. However, it enters in APX mode and in recovery.

edocod said:
I waited all the night.
The tablet isn't mine so i don't have the CPUID. However, it enters in APX mode and in recovery.
Click to expand...
Click to collapse
Sorry, being even in APX mode you can't do anything without your CPUID. Sorry, but the only thing I can think of now is to send it in to Acer to repair.

CurtisMJ said:
Sorry, being even in APX mode you can't do anything without your CPUID. Sorry, but the only thing I can think of now is to send it in to Acer to repair.
Click to expand...
Click to collapse
You can get the CPUID in APX mode, see [GUIDE] Recovering Recovery/Obtaining SKB.

eppeP said:
You can get the CPUID in APX mode, see [GUIDE] Recovering Recovery/Obtaining SKB.
Click to expand...
Click to collapse
Maybe I should do my research next time Once you got the SBK you should be set to flash:good: Good Luck!

[Q] Is my Iconia A500 dead?

My moms A500 is stuck on the acer boot screen. She said that she had just opened a new tab in the browser and it froze up. Its 100% stock so its not a failed rom or anything. So does this mean it a hardware issue? I just don't want to keep wasting my time trying things to no avail. I have tried to flash Stock image a couple times with different files. I'm by no means a pro so any input is valued greatly. Thanks! Also it has been acting up and lagging pretty bad the last couple months.

phillipmc95 said:
My moms A500 is stuck on the acer boot screen. She said that she had just opened a new tab in the browser and it froze up. Its 100% stock so its not a failed rom or anything. So does this mean it a hardware issue? I just don't want to keep wasting my time trying things to no avail. I have tried to flash Stock image a couple times with different files. I'm by no means a pro so any input is valued greatly. Thanks! Also it has been acting up and lagging pretty bad the last couple months.
Click to expand...
Click to collapse
Have you tried a factory reset?
Resetting your Acer A500 tablet:
Holding Volume UP, Turn on Power, then switch Lock On/Off back and forth with Volume Up Continually held. THIS STARTS THE RESET, wait for 20 sec. to start Android.
You may have to perform a reset if your tablet fails to respond when buttons are pressed or the screen is tapped.
To reset your tablet use a small thin object (such as a paperclip) to press the recessed reset button.

Try to use APXflash to flash the bootloader. maybe the bootloader is corrupted.

phillipmc95 said:
My moms A500 is stuck on the acer boot screen. She said that she had just opened a new tab in the browser and it froze up. Its 100% stock so its not a failed rom or anything. So does this mean it a hardware issue? I just don't want to keep wasting my time trying things to no avail. I have tried to flash Stock image a couple times with different files. I'm by no means a pro so any input is valued greatly. Thanks! Also it has been acting up and lagging pretty bad the last couple months.
Click to expand...
Click to collapse
If its a hardware issue this will tell you
babsector.rar here
If it doesn't 'work' please post the output.
This file will reset your tabs partitions, flash the v8 bootloader and cwm.
ALso just a note: once you format system your tab will have NO OS!! Make sure you flash your rom before rebooting!!!
How to use babsector -
Turn your tab off and put it in apx mode manually. Press and hold reset button, hold power for 3 secs after the light comes on and release it, after another second release the reset button. Your screen is black and the power light is on.
On your PC:
Download and extract the .rar to a folder on your PC
Connect your tab to your PC
Navigate to the babsector folder and click on 501 A.bat
On your tab:
Reboot into recovery power/volume DOWN - (closest end to the power button)
Go to Mounts and Storage Menu and
Format - System, Data, Flexrom, Cache
Then flash your ICS/JB rom, power off.
Go back into apx mode and run 501 B.bat
Reboot into recovery and do the wipes
Reboot!!!
Click to expand...
Click to collapse
dibb

[Q] Another A500 Stuck in APX Mode

Hi there,
I have an A500 Iconia Tab that's been stuck in APX mode for a while now. I've tried to retrieve my info with blackthund3r's tool but nothing worked. If anyone could provide a step-by-step for me, it'd be greatly appreciated.
I've also tried resetting my tab by holding down the vol- and power button, that didn't work either.
Thanks,
Rich

You need the cpuid b4 you can do anything, that's yr first priority. See the cpuid guide in my Sig.
To get out of apx mode, just rebo or....hold the power button until the white power led goes out, then power on again - hold pwr button in 5 secs till led comes on. Now, wot do u see??
If you've bricked it or it won't boot to the OS run the babsector file in the root guide in my Sig.
Make sure you have Acer and sdk drivers installed. If yr pc is 64bit or win 8 you'll have a mission on yr hands. I think someone has posted a workaround in last couple of days but don't quote me on that
Sent from my HTC_PN071 using Tapatalk

dibb_nz said:
You need the cpuid b4 you can do anything, that's yr first priority. See the cpuid guide in my Sig.
To get out of apx mode, just rebo or....hold the power button until the white power led goes out, then power on again - hold pwr button in 5 secs till led comes on. Now, wot do u see??
If you've bricked it or it won't boot to the OS run the babsector file in the root guide in my Sig.
Make sure you have Acer and sdk drivers installed. If yr pc is 64bit or win 8 you'll have a mission on yr hands. I think someone has posted a workaround in last couple of days but don't quote me on that
Sent from my HTC_PN071 using Tapatalk
Click to expand...
Click to collapse
Hey Dibb,
I've already tried everything in your sig to get the CPUID:
(1) From a PC using Blackthund3rs A500 manager - start --> opening server ---> stalls ---> closing server
(2) From your device using Terminal Emulator App --> Can't access tablet
(3) From USBDeview must have previously used the Tab under HC with the PC you're using --> Tried, not located
(4) From a uid.txt in any Honeycomb-cwm backup in external_sd/clockworkmod/backup/"your_HC_backup" folder --> no backups available
(5) From adb devices if you're running honeycomb --> N/A
(6) From cwm 1.7.2 via on screen display and a text file - great if you are on ICS already --> Can't access tablet
(7) From a working system in /sys/firmware/fuse/acer_cpuid --> Can't access tablet
(8) Gersma's OTA Tool --> turned off UAC and tried but tool claimed to have problems accessing tablet even though Device Manager had tablet as "acer-recovery"
Toggling the power button does nothing - it's white when the tab is powered "on" and dark when the tab is powered "off".
I have never seen the ACER logo that others have seen. My screen has always been black.
I definitely have the Acer driver installed but which SDK drivers are you referring to? I've tried installing the Google and Naked drivers found on this site but they didn't help.
I think I tried babsector as well but I don't recall what happened, but since my tablet is still non-functional, I'm going to say it didn't work ha.
Any other ideas?

Linux is the only other way, srbeens method.
If u think u have the drivers installed correctly the only other thing I can suggest is to power off. Then put yr tab in apx mode via the buttons. Getting the reset button in can be 'awkward' but timing is not so crucial. As long as there's a delay between the holding in of the reset and pushing the pwr btn in - then a delay between releasing the pwr button then the reset. Don't use a pin or anything sharp to push the reset pin in, they can slip off easily, use a paperclip, an earring stud...anything with a squarish, flat bottom.
Then run babsector or any other EUU based Rom. Leave the auto tools alone for the meantime they're no use to atm.
Good luck!
dibb
Sent from my HTC_PN071 using Tapatalk

[Q] Help please !! Autostart f bootloop "Recovery Booting screen" after flashing Twrp

[Q] Help please !! Autostart f bootloop "Recovery Booting screen" after flashing Twrp
Long time xda lurker here,
I have just thrown my t mobile note 3 into an autostarting bootloop that i dont know how to recover from. I have successfully used this same process 4 times on 4 devices, S 3, tab 2,galaxy light and lg volt. Although this time i used mobile odin as the flash tool.
I flashed twrp to the note 3 because it didnt have any recovery at all. Ive had this phone rooted for about a year without a recovery. After flashing twrp now it constantly autostarts to the logo screen and in top left corner it says recovery booting then it restarts with the same result. Ive tried leaving the battery out for an hour but when i reinsert it, i dont even have to push power and it starts bootlooping again. I cant get in download mode,safe mode, recovery mode, anything mode. Im at a loss. Any advice,any at would be appreciated. Is there any way to fix this.

Wattavatta said:
Long time xda lurker here,
I have just thrown my t mobile note 3 into an autostarting bootloop that i dont know how to recover from. I have successfully used this same process 4 times on 4 devices, S 3, tab 2,galaxy light and lg volt. Although this time i used mobile odin as the flash tool.
I flashed twrp to the note 3 because it didnt have any recovery at all. Ive had this phone rooted for about a year without a recovery. After flashing twrp now it constantly autostarts to the logo screen and in top left corner it says recovery booting then it restarts with the same result. Ive tried leaving the battery out for an hour but when i reinsert it, i dont even have to push power and it starts bootlooping again. I cant get in download mode,safe mode, recovery mode, anything mode. Im at a loss. Any advice,any at would be appreciated. Is there any way to fix this.
Click to expand...
Click to collapse
If the phone turns on by itself when you put the battery in then it's almost certainly the Power switch on the mainboard or the plastic Power button (which is what we interact with).
If that's happening on your phone the first thing to check is the case (if present), to make sure it's not pressing on the Power button.
Next would be to take the phone apart and gently pry the plastic Power button off (there's two legs that hold it in - be careful not to snap them off).
Finally, the Power switch itself - it may just be gunked up, in which case you can try compressed air or electronic contact cleaner (be sure to remove the battery first!) and exercise the switch to get it working.
Otherwise you'll have to replace the switch.

I am going to give that a look right now but it wasnt stuck before flashing twrp. Mobile odin said it was going to restart then it immediately started doing this.
Ok going to check power button now.
Sent from my SGH-T399 using XDA Forums

The power button seems to be clean on the board and its free on the case, unfortuanately that wasnt the problem.
Sent from my SGH-T399 using XDA Forums

Wattavatta said:
The power button seems to be clean on the board and its free on the case, unfortuanately that wasnt the problem.
Sent from my SGH-T399 using XDA Forums
Click to expand...
Click to collapse
I've had this before and in my case the Recovery is in place but the boot loop will not let you access it.
Try forcing the phone down by holding down power for >8secs. Then as soon as it goes off, press Vol Up + Home + Power to go to Recovery. If it works, Factory Reset and see if it starts.
If that doesn't work, (Factory) then try flashing a ROM from your extSD if you have one, or flash the TWRP Recovery from there.
If that doesn't work either, remove battery and as you put it back in, have Home + Vol Down + Power pressed as you push battery in - just have battery sitting ready to push in with 1 finger holding it, press the 3 buttons and push battery home. Go into DL mode and Odin a firmware. Get the TWRP .tar file from TeamWiz and flash it from Odin after the ROM. Take the tick out of 'Auto Reboot for both processes. Take phone down, restart in Recovery and flash SuperSU.

Ok journeyman16,
Trying those 1 by 1 right now. Hopefully 1 will work, thanks for reply.
Sent from my SGH-T399 using XDA Forums

Journyman16 said:
I've had this before and in my case the Recovery is in place but the boot loop will not let you access it.
Try forcing the phone down by holding down power for >8secs. Then as soon as it goes off, press Vol Up + Home + Power to go to Recovery. If it works, Factory Reset and see if it starts.
If that doesn't work, (Factory) then try flashing a ROM from your extSD if you have one, or flash the TWRP Recovery from there.
If that doesn't work either, remove battery and as you put it back in, have Home + Vol Down + Power pressed as you push battery in - just have battery sitting ready to push in with 1 finger holding it, press the 3 buttons and push battery home. Go into DL mode and Odin a firmware. Get the TWRP .tar file from TeamWiz and flash it from Odin after the ROM. Take the tick out of 'Auto Reboot for both processes. Take phone down, restart in Recovery and flash SuperSU.
Click to expand...
Click to collapse
Nothing stops the "recovery booting" bootloop. Although for some reason i now have to actually push the power button before the power comes on after a reinsertion of the battery. But still same bootloop. Idk getting really discouraged with this one.
By the way, I do have an ext SD card with 2 nandroid and a titanium backup but they are useless with what it's doing
Sent from my SGH-T399 using XDA Forums

Wattavatta said:
Nothing stops the "recovery booting" bootloop. Although for some reason i now have to actually push the power button before the power comes on after a reinsertion of the battery. But still same bootloop. Idk getting really discouraged with this one.
By the way, I do have an ext SD card with 2 nandroid and a titanium backup but they are useless with what it's doing
Sent from my SGH-T399 using XDA Forums
Click to expand...
Click to collapse
That's strange. It might be a timing issue where you aren't doing the DL mode buttons quick enough. DL mode should be available if it gets far enough to try Recovery boot. Did you try having the 3 buttons pressed and holding them down before pushing the battery in? (as in Vol Down + Menu + Power) I ask because it can be awkward to do it all at once - and it takes only a split-second lift of a finger to miss the boot.

Journyman16 said:
That's strange. It might be a timing issue where you aren't doing the DL mode buttons quick enough. DL mode should be available if it gets far enough to try Recovery boot. Did you try having the 3 buttons pressed and holding them down before pushing the battery in? (as in Vol Down + Menu + Power) I ask because it can be awkward to do it all at once - and it takes only a split-second lift of a finger to miss the boot.
Click to expand...
Click to collapse
Yes i have tried it a hundred times at least, lol. I was holding the buttons then pressing it against my leg to insert the battery fully.
I dont understand it either. Im at the point of just leaving the battery out for about 8 hrs then trying again, basically a hope and a prayer situation.
Sent from my SGH-T399 using XDA Forums

After my 2 1/2 hrs of sleep i put the battery back n and it went in download mode thankfully.
Tried to start it normally but it just loops to logo without recovery booting on thr screen.
Guess i wiped it somehow with mobile odin. Idk.
Thanks for all the help.
Ill be using regular odin when i get home to restore it.
Sent from my SGH-T399 using XDA Forums

Note 3 is working better than new
As an update, I ended up putting the tweaked ROM with custom kernal on my device and it just purs along at lightning speed now.That's an absolutely wonderful ROM. I highly recommend it. Only problem is if the battery dies it goes into a bootloop but as soon as I connect the charger it boots up. Not a ROM problem I don't believe though. Oh well thanks for the help guys.