Asus m5a97 r2.0 problem when turning on

Dapperzking

Reputable
Apr 26, 2015
1
0
4,510
Parts:
asus m5a97 r2.0 motherboard
2x4gb sticks of ram (adata xpg ddr3 2400 pc3-19200)
zotac geforce gtx 970
cooler master G series 600w power supply
amd fx 8350 cpu
western digital caviar blue 1tb hard drive
nzxt h440

Okay so i have had the pc for approximately 4-5 months now since i built my pc and it would sometimes turn on without producing anything on screen, i soon found out that this was a problem with the power line that goes into the motherboard not being put in far enough, i then adjusted it back to normal and the pc worked like usual until about 3 weeks later when i was on my pc and it suddenly restarted when i was on it. At first i thought this was a result of the same power cable not being put into the motherboard again but as soon as i checked, it turns out the power cable was not out of place so it must be another problem. I tried out 2 different graphics cards same thing happened, moved around the ram sticks, same thing happened, plugged and unplugged every power cable same thing again, unplugged HDD and tried to boot without it, so i just narrowed it down to either the CPU or the mobo. But i doubt it is the cpu as i removed it and examined it to see if it had any problems on it but it did not. All it does now is turn on with no signal on the screen yet all fans are running as per usual, i suspect a fault in the mobo

So my questions now are, has this happened to anyone with the same mobo? what can you suggest i do? is it potentially any other parts? and why do you think it happened?