Originally Posted by sspy
can you tell me how can i downgrade the firmware 20120621_Android_ICS-ATV-108-c03ref
of the Android 2.3 & 4.0 WiFi Internet HD 1080P HDMI Google TV Box ARM Cortex A9 to
the official firmware for ATV-108 rev 1 : ICS.MBX.20120422
and install it. Open update.zip of firmware to which you want to downgrade with WinZip, WinRar or similar utility.
Inside update.zip, navigate to META-INF/com/google/android and edit updater-script file (I recommend to use Notepad++). In this file you will find line similar to:
Remove that line and replace updater-script file inside update.zip.
From within Windows Explorer, right click on update.zip and choose Sign with SignTool. Your update.zip will be automatically resigned and ready to be installed.
SignTool is made by me, it's virus free and it do have installer. Also, icon of SignTool will be placed on Desktop after installing so you can run it and manually select file to sign.