Yesterday, I installed your H77m-itx board with the components as given above. I installed Windows 8 and everything seemed fine. I left it installing updates over night.
When I came back this morning, the machine was powered off. I thought it probably was some form of standby/s3/s5.
When pressing the power button, the lights come up, the CPU fan starts and starts to rotate quickly (loudly). Then, after ~9 seconds, the system shuts down. Another 4 seconds later, the system starts up again and the cycle repeats. I've watched this happen for 5 times, then switched off the power at the back of the PSU.
I think I have the same problem as the guy in H77M-ITX no post
I tried resetting the CMOS using the Jumper, but that didn't help, same symptoms.
I tried disconnecting the 8-pin power-plug from the PSU connected to the 4-pin ATX12V plug of the mainboard. When I do that, the board starts up and does NOT shut down, but it doesn't POST/boot either. The fans slows down to normal speed, but the screen remains black and the HDD light doesn't flash.
Please advise on what to do. Is this a known issue?
I think I'll have to return the board, because I cannot even start it far enough to do a BIOS update :(