I finished building the computer, but i realized i didnt put the standoffs, the mobo im using is an asus m5a97 r2 and the graphic card is an asus GTX 760 2Gb, the problem is when i connected it to the monitor, it said that no hdmi detected. Also, the motherboard has an 8-pin connector and my PSU has an 4 pin connection. How could i solve this? also, the red led turns on when i turn on the computer.