Computer Turn on Then Turn Off immediately - Repaired

Hello,
1st find the problem by removing Ram or 4 pin connector . if after remove 4 pin connector cpu fan spinning up. then fault is on VRM section. check 4 pin connector short or not with digital multi meter . If not then check mosfet and capacitor. you will find the short component replace it.or this problem is not coming from vrm section then check Ram section circuit and other section of motherboard. thank you