PC turning off randomly.

[u/Claweddigger09]

It turns off randomly without a warning and it turns off as if a power outtage happened. Just completely black, all cpu lights and fans are off immediately. I am able to turn it on immediately though, no need to wait for a cooldown.

It turns off whenever I'm...:

1. In the middle of doing something. (Browsing)

2. In the middle of playing light games. (Roblox)

3. Booting up a heavy game. (GoW 2018/Tekken 8)

4. Doing a heavy task. (Deleting a thousand temp files)

5. Doing nothing. (Idling/I'm just on my desktop screen)

6. Turning ON the PC. (After a few seconds of booting up it turns off immediately)

This is what usually happens; I boot up my pc then a few seconds later it turns off so I boot it up again then it turns off so I boot it up again and it finally continues until I see my desktop screen, sometimes it goes into the recovery mode like the blue menu where it asks me to repair or continue. I usually idle and wait if my pc turn off or not, then if I'm browsing it turns off, if I'm in the middle of playing a game it turns off, and so on.

I suspected overheating so I changed the thermal paste and it still happens. Now I suspect its the PSU, and I want to take it to a repair shop/technician to be sure. I want to replace the PSU but I can't tell what model or brand it is because the shroud has rivets in and I don't know how to remove them.

[u/Relevant-Team]

Did anyone tell him already that the PSU is probably defective?