With my ACER a700, Android crashed. Now, each time I turn it on it starts in fastboot mode. I tried to unlock bootloader to install Cyanogen, but after command line I have an response like "Error: Unknown error".

Is there a possibility to reset completely the device in order to reinstall a ROM?


I downloaded rom from this link and move update.zip onto SD card. I would boot in recovery mode but I can't, because of bootloader. I have the following output:

Booting failed
Bootloader vJB-663b3d3: Starting Fastboot USB download protocol

It seems I have not recovery menu. Also, I can't doing 'factory reset', I have the same failed.

  • Did you try flashing a stock firmware?
    – esQmo_
    Nov 29 '16 at 12:36
  • Thank for your answer @esQmo! No, I didn't. How could I do this?
    – AnthonyB
    Nov 29 '16 at 12:59
  • Check my answer. And did you try fastboot -w conmand to reset the device?
    – esQmo_
    Nov 29 '16 at 13:05
  • I did not try fastboot -w, I did try to unlock bootloader. What should it do?
    – AnthonyB
    Nov 29 '16 at 13:14
  • It will reset the phone and reboots.
    – esQmo_
    Nov 29 '16 at 13:21

The issue can be solved by flashing stock firmware to your device.

Download the firmware and flashing tool from here.

Edited: List of A700 ROMs and updates from XDA Developers + Flashing procedure.

  • I'll try to do this. I just need to download one zip, right?
    – AnthonyB
    Nov 29 '16 at 13:14
  • Just one zip file.
    – esQmo_
    Nov 29 '16 at 13:20
  • Have you tried? I'm trying to download one of the ZIP, but I have the following error on the website: ` The public file you are trying to download is associated with a non-valid account. Please contact the owner for further assistance. `
    – AnthonyB
    Dec 1 '16 at 20:26
  • No, I didn't download any file.
    – esQmo_
    Dec 1 '16 at 20:27
  • It seems files are no longer available because of owner account.
    – AnthonyB
    Dec 1 '16 at 20:30

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.