Have you tried clearing CMOS? Unplug system from wall and remove CR2032 battery from board for 15 minutes.
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The available BIOS files start with version 0053. If motherboard is fine the version 53 or 63 should work. I suggest you to use memories of DDR3 1333MHz at 1.5V.
Try with the Recovery BIOS Update method after removing the CMOS battery and wait 30 minutes at least then, plug battery in.
Recovery BIOS Update Instructions for Intel® Desktop Boards