[Acer Iconia A500] dibb_nz:
Retrieve your CPUID

(1) Use a500Manager Tool (download at bottom of post)

This tool is your first port of call! It will download the drivers, retrieve your CPUID, and flash the unlocked bootloader.

(2) Using Terminal Emulator

Reboot your tab

dmesg | grep androidboot.serialno

some have reported this did not work for them but that this one did when they tried it:

dmesg > /mnt/external_sd/dmesg.txt

(3)Using USBDeview

Suggest you extract to the same folder you used for your adb files,

USBDeview will only work when you have previously plugged your tab into the PC WHILE

you were running HC Rom and BL

1 Run the exe and you will be presented with a window of all the USB devices you have ever plugged into your computer.

2 Click on "VendorID" along the top to sort them

3 Look for the number "0502" under VendorID or 3325 "ProductID"

4 In the serial number column will be a 15-digit number this is your device ID

5 Write the number down and put a 0 in front of it and now you have your CPU ID!!!

(4) From your nandroid backup

In the cwm folder on your ext. sd card - open one of your backup folders and look for "uid.txt" file.

From cwm 1.7.2 on, will dislay your "uid" on the menu screen, and from memory TWRP does too.-

(5) Run command "adb devices" in command prompt HC ONLY

(6) From Custom Recovery

Most of the custom recovery's now have your uid displayed on the main screen of the recovery menu

(7) From a working Tab...

open yr file explorer, esfile explorer is a great one....

navigate to:

/sys/firmware/fuse/acer_cpuid - add a zero to the front!!! easy peasy;)

(8)From a bricked or non-booting Tab

then things become a little more complex. And more involved if you have no backup.

The only way is using Linux. srbeen has a guide to do this using code by eppeP. There are those who being Linux noobs have had success with this method.

Read the whole thread as there are some helpful hints all thru the guide. If you get stuck eppeP is still around and will help out, if you can show an example of

"how and where" something does not seem to be working for you. If your questions go unanswered its because its been answered before so please go thru the thread!!!

here.

srbeens guide here

Cannot boot tab because:

(1) "Write Protected - need to enter password

If you encrypt your data and forget your password - you must do a full data reset wipe to get into your system again

(2) Stuck on the Acer Screen

From user JDGM3NT4L - Want to return to stock? This is for you...

A500 Back to Factory Stock the easy way

- via stock update.zip method

- no cpuid required,

- use with or w/out patched bootloader.

- needs cwm installed

- full data wipe needed

(3) Other things to check

- check data cables, micro-usb cable required

- plug in to another USB Port

- check you have the cable actually connected to both device

Try a different PC. Vista/Win 7/XP usually have no problems, there are issues with Win8 and 64bit systems

Also a heads up for when entering your uid's into the tool generators - a space counts as a character and will produce

an incorrect sbk!!!

You CANNOT use lowercase letters in your cpuid. If you do lowercase it will give you a different result

Vaches new SBK Tool here OR [/B]

DRIVERS

The drivers are not installed properly, I can hear you all already!! I've done that over and over and its not working!!!!

sometimes if you fail to complete a nvflash you need to completely reinstall the Acer Drivers before it seems to want to finish...ssoooooooo, uninstall and reinstall!!!!

Acer Support for Acer APX/Fastboot/Recovery Drivers

Android SDK for the adb/USB drivers - You can d/l a mini zip containing just the adb and fastboot drivers attached to this post "adb_fast.zip"

GUIDES

Civs Guide to flashing the bootloader

walkthrough using apxflash tool at Step 6

From Civato's OP of The Guide: nvFlashToolPackages

Skrilax_CZ bootloader thread and should be "required reading" for anyone mucking about in their tabs internals!!!!

Rollback to HC

jazzyjames guide here

Iconia Root/gingerbreak: For returning to Honeycomb

GETTING ADB SET UP

It's a pain typing "my path" into cmd, can't I just type "adb devices"

Set adb as Environment Variable or call adb direct from command prompt

first, copy the path to your install - in this case:

"Path to adb" = C:\android\

1. Click on the Start menu

2. Right click on Computer

3. Click on Advanced system settings

4. Click on the Environment Variables button

5. Look for Path in the System Variables section. Double click on it

6. Go to the end of the Variable value box and put in a semicolon ;

7. Now paste your "Path to adb" after the ;

8. it should look like this in this case C:\android\adb

9. Now test it out - start - run/search - cmd - in cmd window type: adb devices

10. If you've followed the steps you will see your device ID - voila!!!!

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