Also the only way to turn it on is to plug it in the outlet, without pressing the on switch. Also my bro's computer is like 7-8 years old, could this be a factor? And can you explain "try using a paperclip to short the appropriate pins and see if the mobo is doing what it should be doing. If not, you're having mobo trouble." a little more because I don't understand.
3770K | ASUS STRIX GTX 1080 | DDR3-1600 16GB | CORSAIR 650D | CORSAIR HX 850W | CORSAIR H100 | SOUND BLASTER Z | ASROCK EXTREME4 GEN3