DRG,
This is a really unusual situation, since we do not use American Megatrends Bios in our motherboards.
The recommendations I can provide you for this issue are the following:
- Test the board out of the chassis using minimum configuration such as Motherboard, processor, 1 memory stick and power supply.
- If this behavior started after the BIOS updated, you can try rolling back to the previous BIOS version.
- If you had have this behavior since you purchase the motherboard, please send me a private message with all you personal information in order to create a service ticket and replace the product if it still under warranty.
Regards.