here is a guide and some pix so you can see what 'should' happen when using civato's nvFlash manual method.
Get yr 15 digit CPUID - not your 11/13 digit ICS serial no.
the correct uid is VITAL, using the wrong one can cause you problems.
all righty you've made the decision to flash the patched bootloader and install a custom recovery and one of the many custom ICS/JB roms -
1. Ensure both Acer and adb drivers are installed
2. Retrieve HC CPUID
3. Generate your SBK from Blackthund3rs site: http://a500bootloaderflash.tk/sbkcalc/
4. Download yr ROM of choice and put it on yr external sd card
5. Put your tab in APX Mode manually or with apxFlashTool
6. Flash the Bootloader/Custom Recovery
7. Reboot to Custom recovery and do a full data wipe/format
8. Flash your chosen ICS/JB ROM
9. For good measure reboot to recovery and do another full wipe
10. Reboot and enjoy ICS/Jellybean
nb: I know it sounds overkill for all these data wipes/formats but in my experiences and alot of others on here multiple wipes ensure a smooth
To enter APX mode - Turn your tab off then press and hold in the Reset button(with paper clip).
Do not release it.
Press and hold power for 3 secs and then release it.
After another second, release the reset button.
Download V8-UNL-ICS-HC-bootloader-MULTI-cwm and extract the files for the manual nvFlash
If you are coming from HC then d/l your ICS/JB rom of choice to yr ext sdcard
WARNING: at Step 7. Do not "press any key to continue..." UNLESS yr tab is in bootloader mode, doing so causes alot more issues and
necessitates a rollback to HC if you continue....
ok here we go:
Step 1. You must enter APXMode FIRST
Your Windows PC should then detect your device and install the APX driver. You should then have an APX USB device installed.
If you do not have an APX USB device listed in your system tray, you cannot proceed.
The screen of your tablet is black and the Power Light is ON
Step 2. Once yr tabs screen has turned black and the power lite is on then
Step 3. Right click on the v8.bat file from civs package and choose "Edit"
Go thru the file and remove any "Cls" lines if there are any - this allows you to see what the flash is doing.
Save the changes thenRun the bat file - i'm using V6-3.bat in this example but if you are using v8 it will be named v8.bat
NOTE: You will see an instruction on the opening screen to "delete recovery from boot.p file"
On a reboot, this file overwrites your newly flashed custom recovery with the Acer Stock Recovery, not what we want!!
Please check /system for the boot.p file - if its there then delete or rename it b4 going on
Step 4. Enter your SBK
Step 5. Your tab will display this - "System Information" Screen
Here you can see clearly your one and only cpuid!!!! Or 'chip uid' as it is named here.
Warning: If this system info is not displayed you run the risk of getting stuck in apx mode....
Close out of the command window and disconnect your USB and check yr SBK and/or the Acer USB Driver is showing in your "Safely remove hardware" icon
if it isnt reinstall the Acer Drivers
Step 6. All systems are go!! Go ahead and press any key...when your tab is in bootloader mode
7. WAIT for your tab to display "Acer Iconiaa500 APX Mode"
this is 'bootloader mode' where the flash needs to take place,
then press any key...
if you carry on without yr tab showing this message...
then you will softbrick and to fix that you will need to downgrade to HC and
you will lose all your data
There are 'usually' only 3 reasons you will not see the "Acer Iconia a500 APX Mode" message
1. The Drivers are failing to install correctly
2. Incorrect cpuid
3. Getting stuck at Formatting/partition errors is the ".bct issue" apxFlashTool 0.4 fixes this
Step 8 the flash begins!!!
the flash will take about 30 secs at most
on your tab you will see in big white letters the word PASS
in smaller red letters "Reboot the Device"
So power down yr tab and reboot into your new recovery and backup your system then flash your ICS/Jellybean Rom.
Congratulations you are no longer a chicken
EDIT: I've tried not to put too much info in here to keep things relatively easy to read - if you think there is info that should be in here just let me know and I'll add it