Need help diagnosing my computer

langtoc123

Reputable
Mar 14, 2015
8
0
4,510
System spec
CPU i5 4670k 3.4ghz
MB asus z87 a
8gb(4*2)1866mhz
PSU corsair 800w
GPU evga gtx 770 4gb

What happened was sometimes while I am playing video games my pc just suddenly shut down by itself than it start up again but sometime nothing post so I have to hold the power button to force shut down and turn it on again. I manage to get it working that way for a good year. Yesterday my computer just shut down by itself as usual and now it won't turn on no matter what. I have tried different power supply but still nothing , when I press the power button there s nothing running or starting up even the fans won't move. When I tried turned off the power supply and turn it on again the fan kind of liked moved for a little bit and stop and there s no post or anything from the mb. What do you guys think the problem is ? Thank you
 

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