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[Q] How to recover a bricked A510? Bootloader can't be unlocked!

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By h4ck3r3l, Junior Member on 4th September 2013, 10:32 AM
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Hi folks,

I have been using Acer A510 for almost 1 year now, and upgraded 7 months ago to the latest JB OTA. I haven't ever rooted it.

Since 2 days, it can't boot suddenly, stuck with the following error message:

Quote:

Booting failed
Bootloader vJB-d0ca683: Starting Fastboot USB download protocol

After a bit of Googling, I tried to unlock the bootloader, as a way to recover the tablet. But that keeps failing as well:

Quote:

[ [email protected]: /tmp ]# fastboot oem unlock
...

At this step, I can see the unlock icon and played with Vol+ and Vol- to quickly select the "Unlock" option, and this is what I get on the tablet:

Quote:

Unlocking...
Bootloader vJB-d0ca683: Starting Fastboot USB download protocol

And on the computer (kind of error messages that are of no help):

Quote:

...
FAILED (remote: (Unknown error code))

So it appears the bootloader can not be unlocked, and I can not even enter the recovery.

I've read somewhere that it may be possible to recover in APX mode.
So is there any way to recover it (either through the bootloader or through APX mode)?

Thanks for your help!
9th September 2013, 10:20 PM |#2  
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Booting failed.......Bootloader VJB-d0ca683
Hi.
I have been using Acer A510 for almost 1 year now, I haven't ever rooted it.

Today, it can't boot suddenly, stuck with the following error message:


Quote:
Booting failed
Bootloader vJB-d0ca683: Starting Fastboot USB download protocol


Please help me.....
6th November 2013, 11:52 PM |#3  
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Quote:
Originally Posted by h4ck3r3l

Hi folks,

I have been using Acer A510 for almost 1 year now, and upgraded 7 months ago to the latest JB OTA. I haven't ever rooted it.

Since 2 days, it can't boot suddenly, stuck with the following error message:



After a bit of Googling, I tried to unlock the bootloader, as a way to recover the tablet. But that keeps failing as well:


At this step, I can see the unlock icon and played with Vol+ and Vol- to quickly select the "Unlock" option, and this is what I get on the tablet:



And on the computer (kind of error messages that are of no help):



So it appears the bootloader can not be unlocked, and I can not even enter the recovery.

I've read somewhere that it may be possible to recover in APX mode.
So is there any way to recover it (either through the bootloader or through APX mode)?

Thanks for your help!

I am having the same problem with my acer A700,I tried anything I could and I still did not find any solution,help would be very appriciated.
3rd December 2013, 10:31 PM |#4  
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Unhappy Same situation
Quote:
Originally Posted by h4ck3r3l

Hi folks,

I have been using Acer A510 for almost 1 year now, and upgraded 7 months ago to the latest JB OTA. I haven't ever rooted it.

Since 2 days, it can't boot suddenly, stuck with the following error message:



After a bit of Googling, I tried to unlock the bootloader, as a way to recover the tablet. But that keeps failing as well:


At this step, I can see the unlock icon and played with Vol+ and Vol- to quickly select the "Unlock" option, and this is what I get on the tablet:



And on the computer (kind of error messages that are of no help):



So it appears the bootloader can not be unlocked, and I can not even enter the recovery.

I've read somewhere that it may be possible to recover in APX mode.
So is there any way to recover it (either through the bootloader or through APX mode)?

Thanks for your help!


+1

I get exactly the same problem this WE
I never root/flash/play with recovery or anything else.

Tablet shutdown by itself, then after restart I get trouble to boot :
  • First the Android said it was unable to start due to encryption : "encryption unsuccessful > need factory reset". Even if I NEVER activate encryption !
  • I try couple of reboot without suceess, then now it stop on Acer logo and go to fastboot mode at each startup.

Then I have exactly same trouble : impossible to unlock bootloader using fastboot.
No way to flash something.

Need help !
4th December 2013, 09:42 AM |#5  
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If fastboot is available, you can try to boot CWM Recovery or TWRP recovery

fastboot -i 0x0502 boot C:\....\cwm-recovery.img

From there you can try a factory reset
4th December 2013, 08:47 PM |#6  
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Quote:
Originally Posted by Shreps

If fastboot is available, you can try to boot CWM Recovery or TWRP recovery

fastboot -i 0x0502 boot C:\....\cwm-recovery.img

From there you can try a factory reset


It doesn't work as the bootloader is still locked !
Code:
FAILED (remote: bootloader is locked.)
And it's impossible to unlock bootloader as describe in the post.
Any other idea ?
5th December 2013, 10:49 AM |#7  
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You can try to download the full ROM from acer Web Site (GEN1 or CUS1 depending on what you had before)
rename it to update.zip and put it on your sdcard
Reboot your tablet in recovery if you can to flash it, or in bootloader (don't remember if the Acer bootloader can flash an update.zip)
10th July 2015, 08:30 AM |#8  
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Quote:
Originally Posted by katull

Hi.
I have been using Acer A510 for almost 1 year now, I haven't ever rooted it.

Today, it can't boot suddenly, stuck with the following error message:


Quote:
Booting failed
Bootloader vJB-d0ca683: Starting Fastboot USB download protocol


Please help me.....

Its 2015 now but i will post this anyway..

Try this

1st, Boot into recovery:

- Press [vol-] + [power]
- Once the tablet vibrated, let go [power] and keep [vol-].
- Now the tablet vibrates a second time, let go [vol-] and press [vol+] quick
- Once the text that appears on the screen ("loading recovery kernel image"), let go [vol+].

2nd, choose "Wipe data cache & factory reset" via volume rocker and power button to select it.
3rd, choose "reboot"

I solved mine using that steps, hopefully it will solve yours.
The Following 2 Users Say Thank You to Zewz For This Useful Post: [ View ] Gift Zewz Ad-Free
27th September 2015, 10:38 AM |#9  
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Thank you very much!!! It worked for me!
10th June 2016, 08:17 PM |#10  
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Quote:
Originally Posted by Zewz

Its 2015 now but i will post this anyway..

Try this

1st, Boot into recovery:

- Press [vol-] + [power]
- Once the tablet vibrated, let go [power] and keep [vol-].
- Now the tablet vibrates a second time, let go [vol-] and press [vol+] quick
- Once the text that appears on the screen ("loading recovery kernel image"), let go [vol+].

2nd, choose "Wipe data cache & factory reset" via volume rocker and power button to select it.
3rd, choose "reboot"

I solved mine using that steps, hopefully it will solve yours.

So I have tried the above listed technique and it brings up the clockwork mod screen but does not go past it. Any more suggestions?

Thanks.
18th October 2016, 07:08 AM |#11  
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------------------------------------------------------------------------------------
- Press "vol-" + "power"
- Once the tablet vibrated, let go "power" and keep "vol-".
- Now the tablet vibrates a second time, let go "vol-" and press "vol+" quick
- Once the text that appears on the screen ("loading recovery kernel image"), let go "vol+".

2nd, choose "Wipe data cache & factory reset" via volume rocker and power button to select it.
3rd, choose "reboot"
------------------------------------------------------------------------------------

After trying many other approaches this one worked for me! Thank you very much!
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