Originally Posted by stane1983
Your SDHC is the problem. Try to use smaller non SDHC card (2 Gb or smaller if possible). Scrambled screen means bootloader is not damaged, but flashing firmware went wrong and bootloader cannot read boot logo which is stored on NAND chip.
Latest official firmware afaik
is ICS.MBX.20120629. Go to Google TV subforum, topic Android 2.3 & 4.0 WiFi Internet HD 1080P HDMI Google TV Box ARM Cortex A9 Firmware
and find my post (don't know on which page) with link to firmware, it's posted on same date as firmware was released - 2012-06-29.
Tested yesterday with a 1Gb card. Used SDTool (u-boot-aml-ucl.bin used in SDTool has to be from official firmware right?) then unziped files to card.
reset+boot and same problem with TV-OUT scrambled. I really got to connect the box toa HDMI screen so I can see what's going on...