Not sure what's broken

Owl fri

Commendable
Sep 10, 2016
7
0
1,510
Hi,
In the morning I decided to check my front panel and was messing around with the fan. After I had finished assembling everything back I tried powering the computer on, but none of the components started with the exception of the cpu fan spinning for about half a second. I tested the psu and it ran fine along with the ssds and the ram. So I believe the problem is the motherboard or the cpu. Also, Yes I didn't forget the front panel connectors. I would Appreciate some help. Thanks in advanced!

tl;dr I think cpu or mb broken is there anyway to check?