Hi,
Yesterday I've bought a new PC. It has an i7 3,5 GHz processor, a Gigabyte GAz77x-UD3H mainboard, a Nvidia 680 GTX graphics card, 32 Gb of ram, a 240 Gb SATA and two 2 Tb Harddisks, a 750W power supply (Corsair TX750), a blu-ray writer. The first time I've tried to boot the unit, I was unsuccessful. The lights on the case were lit but there was no harddisk activity. Also the monitor didn't wake up. I have resetted and got the same results. As the graphics card has 2 DVI inputs, I've thought that maybe one of them was inactive, so I've plugged the DVI to the other port, resetted and the computer booted normally. These events happened yesterday. Today, when I turned on the unit, the same thing happened. I've followed the same procedure and it booted again. However one thing grabbed my attention: When the computer doesn't boot, there is no beep coming form the BIOS (I haven't paid attention yesterday), so I don't think the problem is with the graphics card. After booting I did a shutdown and restarted again without a problem.
Following the next shutdown, I haven't been able to boot the unit for nearly 2 hours. The LED occasionally gave a D4 error (3 or 4 times). Otherwise it stops at 96. After 2 hours, it did boot and now the code is AO. I didn't shut it down again, so while it is working I am writing this message. What do you think the problem might be? I've read about some incompatibilities between the PSU (Corsair) and mainboard. Is it a confirmed problem?
N.b.: I've Googled the problem and the 96 code, and almost all of them pointed to threads where the problem is resolved by changing the mainboard. Is there a way to know if I have a faulty mainboard?