How to Factory reset a500 (What Acer Support won't tell you!)

[HD87]

1. Switch off
2. Press Vol-up + Power
3. If display goes on: Release power but hold vol-up
3. Toggle Lock switch (On>Off>On>Off)

Screen will display:

Erasing Userdata..
Erasing Cache..

if you can't go to Settings>Privacy>Personal data>Factory data reset..

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[Icebike]

Acer support tells a lot of people that. Where did you get the idea it was a secret?

[FoFoJoe]

my Tablet is shot to hell.. long story short CWM will load but other than that it stays on the acer screen. i want to 100% wipe the sucker. when i try that ^ it opens CWM.. any advice?

[OranL]

Acer support tells a lot of people that. Where did you get the idea it was a secret?

I only found this step after a good hour of searching online for a solution that didn't involve enabling USB debugging or plugging in a compatible USB keyboard. I, for one, am extremely glad that HD87 took the time to post this trick.

[S_Gaskin]

I've tried doing a factory reset on my A500 and after displaying "Erasing Cache", the screen blacks out and it goes back to being stuck on the Acer screen again.

[Douvie]

I've tried doing a factory reset on my A500 and after displaying "Erasing Cache", the screen blacks out and it goes back to being stuck on the Acer screen again.

Reading your posts, it is apparent that your tablet was in the middle of a update - when you turned it off. Unfortunately, you may have to send it in. Or you could try wiping the sucker and sideloading a custom ROM. Allow it to boot up and then follow the instructions how to go back to stock ROM - maybe 3.01 for starters and work back up to ICS. The instructions are on the forum in one of the threads or you could go to xdeveloper forum.