A500 bricked. How to recover?

Ovlap
Ovlap Member Posts: 2 New User

Actually, the basic instructions are already here:

https://acer.custhelp.com/app/answers/detail/a_id/29931/related/1

 

The problem is that when you go to the download page for manuals and drivers:

http://us.acer.com/ac/en/US/content/drivers#_ga=1.181574820.267539145.1417479834

 

and select your model (e.g. A500 tablet) and select the OS you want (I chose Android 4.0 Ice Cream),

you download a .zip file with a long name like: 

OS_Acer_7.014.12.041.214.02.TWN.GEN1_A40I_A.zip

 

DO NOT JUST COPY THIS FILE TO YOUR micro SD and expect to be able to boot your tablet.

DO NOT RENAME THIS FILE TO update.zip and copy it to your micro SD and expect to be able to boot your tablet.

 

Instead, EXTRACT THIS FILE TO A FOLDER in your PC and you will see that it contains another file called update.zip

SURPRISE!  Every one of these O.S. files in the download page have a different version of update.zip contained within

a .zip folder bearing the version name of the O.S.  Copy the extracted update.zip (do not extract update.zip itself) to your

A500 micro SD card at the top level directory.  Next push the volume down button and power button until the tablet powers up.  Release the power button but keep holding the volume down button until you see the text in the upper left corner then release the volume down button.  At this point, my tablet installed the version of Android I chose without trashing the apps that I had installed.  It works great.  Now there were some more steps in

https://acer.custhelp.com/app/answers/detail/a_id/29931/related/1

like pushing the volume up button, etc.  I did not have to do that with my tablet but you might have to with yours if you have a slightly different version of A500.

 

But the confusing thing none of the articles tell you is that the O.S. downloads are all an update.zip contained withing another <Android version>.zip.  The tablet can only boot to a valid Android O.S. in a file named update.zip in the top level directory of the micro SD file following the volume/power button push sequence.  That is the key.  I also want to credit

http://androidforums.com/threads/un-brick-acer-iconia-tab-a500.345419/

which clued me into this realization.