A OEM7 mod worked at previous boards (except a S3 sleep issue). I'm sorry to hear that You surely have consulted your manual already. No instructions how to get back the original (second) bios? What about Gigabyte support? (Email). Have you tried to remove battery, power cord? Usually you get into dual bios setup by clearing CMOS via jumper......
Hmm, too bad. I feel really sorry. I've checked my mod again. There is no error. I couldn't know before that it leads to that issue, of course. This bios is picky. All other Gigabyte bioses so far were easy to modify.