Pc shut down

[Untouchable]

My pc shutdown while watching a streaming movie. I checked the thermal paste and it looks dried or wasted. My pc won't turn on but the psu is working. Would reapplying help or is the shut down something deeper?

 

[rgd1101]

full system spec?
if you took the cooler off the cpu, need to replace the thermal paste

 

[Untouchable]

Specs is i7 7700, 16gb ddra, gtx 1070.
I tried testing the psu and the fan wont turn o with the paper clip trick so i thin it may be the psu fried