A1: The system.img.gz you applied, wasn't suiting to the firmware version installed on your tablet. Download latest Acer firmware update, copy it on a micro sd card, plug it into your Iconia, go to recovery by holding Volume up and Power button while device is turned off. Then choose apply update from sd card.
A2: If you cannot apply any Acer firmware, because you always get a partition error while installing, you should do a reboot after you get the error. A user reported that this made her/his device boot into Android again, showing the new version in settings -> info. Good luck
A3: If the A1 and A2 didn't help. Send back the device to Acer. Tell them you tried to apply an update from sd card and ended up in this bootloop. Sending device back to Acer over UPS is free. Good luck!
I failed root my AIT A1 and now im trapped in bootloap (my fault,RTFM fail.) I try find somewhere *.zip with official FW to apply it back trough recovery. Got any one advice how solve this issue? On acer.com is nothing usefull.I know how fix but cant find files witch i need....Ty for your time and LINKS...or Ideas