[Acer Iconia A500] JdgM3NT4L:
This is a good way to bring an A500 back to full stock from just about any rom, custom or stock rooted. You need to already have CWM installed.

WIPE SYSTEM/DATA/CACHE/DELVIC FIRST!!!!!!!!!!!!!!!!!!!!!

If you don't already have your UID and SBK get those first and back them up in multiple locations!!!!!!!!!!!!

This quote is shamelessly plagiarized from an answer posted by Moscow Desire on a different thread. Drop in and say thanks to him if it does you some good.

You are going to lose all data. I make nandroid backups with data toggled everytime that I do anything to my tablet. Do you?

After following the above instructions,

Just simply flash a stock 3.2 image. It's really too simple. Flash it in recovery. This even works while using the patched bootloader by skryllax_cz. There are a selection of roms midway down this post and at the bottom. Any of them should work for this.

When the 3.2 finishes it's flash and you reboot. The tablet will show "Flashing Bootloader" under the custom skryllax_cz text.

It will reboot on it's own.

That's it. You should be able to OTA.

I recommend going to the Play store and downloading/install the Acer Update Enhancement utility after the tablet settles down.

However, my tablet downloaded a small update right away without it.

Here is an additional option as suggested by dibb_nz in the 11th post below. drop down and say thanks if it helped!

Good luck and please post your results. Thanks.

Here's a link to a stock 3.1 https://www.dropbox.com/s/fpdy13u4ufec461/Acer_A500_4.010.38_COM_GEN1.zip. It is probably easier to go with one of the 3.2 roms below. But if you want it there it is.

(Directions; Flash the stock 3.1 (Acer_A500_4.010.38_COM_GEN1.zip) AFTER WIPING SYSTEM/CACHE/DATA/DELVIC, reboot, then ota to ICS. After you do the first OTA and it reboots it will say a Flashing Bootloader message then reboot with all stock everything.)

Stock 3.2 - https://www.dropbox.com/s/fpdy13u4ufec461/Acer_A500_4.010.38_COM_GEN1.zip

Stock 3.2 provided by dibb_nz - http://www.4shared.com/zip/GgHzZieZ/HC_32_update.html

Here are two Gen 1 roms provided by dibb_nz. Please say thanks to her.

HC_3.2_Gen_1_OTA_update.zip

HC 3.1_Gen_1_FULL_update.zip

New Link

jasenlee1984 had success using Acer_A500_7.006.03_COM_GEN1 3.2 rom from blackthund3r's stock firmware thread, http://xdaforums.com/showthread.php?t=1816560

If it helps you, click his name and then the thanks button.

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I have included post 20 from below. It is a guide for getting recovery back should something go wrong. What it will do is install CWM as well as the V8 bootloader. After that you can start all over or flash whatever you want.

I prefer to use Blackthund3rs APX Flash Tool. To get the apx tool google this. blackthund3r apx tool

Basically what you will do is get the tool, open it, choose bundle market, choose 17, use default bct, enter APX download mode, and flash the V8 bootloader with CWM.

The steps are... (Copied from here.)

Step 1.

Step 2.

Step 3.

Step 4. I used number 17.

Step 5.

Step 6.

Step 7. I used the default since my tab was fried.

Step 8. At this point you will have to choose to enter APX mode manually. Follow the instructions on the next screen.

Once you are in APX mode and plugged into the pc you should see the message APX device connected. Choose the next arrow, once it runs for a few seconds it will ask you to confirm that the APX download mode has started.

Once it has. Confirm and wait for it to finish. Get into CWM, flash the rom and you should be good to go.

But other than that you should be back to normal in no time.

Good luck.

And again with the links.

Here's a link to a stock 3.1 https://www.dropbox.com/s/fpdy13u4ufec461/Acer_A500_4.010.38_COM_GEN1.zip. It is probably easier to go with one of the 3.2 roms below. But if you want it there it is.

(Directions; Flash the stock 3.1 (Acer_A500_4.010.38_COM_GEN1.zip) AFTER WIPING SYSTEM/CACHE/DATA/DELVIC, reboot, then ota to ICS. After you do the first OTA and it reboots it will say a Flashing Bootloader message then reboot with all stock everything.)

Stock 3.2 - https://www.dropbox.com/s/fpdy13u4ufec461/Acer_A500_4.010.38_COM_GEN1.zip

Stock 3.2 provided by dibb_nz - http://www.4shared.com/zip/GgHzZieZ/HC_32_update.html

Here are two Gen 1 roms provided by dibb_nz. Please say thanks to her.

HC_3.2_Gen_1_OTA_update.zip

HC 3.1_Gen_1_FULL_update.zip

New Link

jasenlee1984 had success using Acer_A500_7.006.03_COM_GEN1 3.2 rom from blackthund3r's stock firmware thread, http://xdaforums.com/showthread.php?t=1816560

If it helps you, click his name and then the thanks button.