Hi everyone
Here is the detailed version of what happened and what I did.
I have had this HTPC for about 14 month with no issue (after updating the BIOS, not sure what version now because I have no display).
I booted up the PC yesterday to find out that the ethernet card was saying "no cable connected". Even the windows troubleshooting said that no cable was connected. So I tried another cable, reinstalling the drivers, updating the drivers to the latest with no success. It was always saying that there was no cable connected. There was no LED lit on the back of the motherboard. Also tried a different switch. The network is properly working.
Next I was suggested to reset the CMOS. I pulled the battery, waited a while and reinserted it. Plugged the power back in, and the ethernet LED lit back up and everything was working. So I shut it down, closed the case and plugged all my devices back. When I turned it back on, the video was missing (using HDMI). The PC look like it was booting normally but there is no video output so I can't access the BIOS or anything. I tried plugging only a VGA monitor or only a DVI monitor without success. Tried removing RAM sticks, HDD, nothing is working. I also tried the extended CMOS clear by removing the battery overnight.
I don't have a spare video card at the moment.
Is there something else I can try or should I RMA the board?
Thanks!