Broken mobo or cpu? Unresponsive on switch

Alpaca91

Reputable
Aug 18, 2015
18
0
4,510
I was usimg my computer which was on the ground when my brother lightly kicked my tower which made the screen say shutting down and turned off immediately. The computer was on for a few days and I figured it may have been overheated. After a few hours I tryed turning it on but it wouldnt do anything. Ive tested the power supply and it works fine. The gpu also works in a diff rig. So I've got it down to the mobo or cpu. When I conmected the green line to test the psu, I left the 8pin cpu power connected (by mistake) and the cpu fan started spinning, so I dont know if this means the cpu works or atleast this part of the mobo works. Any
Suggestions to diagnose if its the cpu or mobo thats broken or possible fixes?