[SOLVED] PC turns on for split second, then turns off, doesn't turn back on ?

[ryqqn123]

I have had my PC for about a year now. It was literally working perfectly just last night. This morning I go to turn it on and it turns on for a split second then shuts off and doesn't turn back on. I tried different outlets and PSU power cables but the same thing happens. The RGB on my motherboard and ram are still on but the entire system just won't turn on. Can someone offer help?

Specs:
Ryzen 7 3700x
ROG Strix RTX 2080 Super
ASUS Prime X570-Pro
G.SKILL Trident Z Neo (2x 8GB)
CORSAIR RMx White Series RM750x White

 

[Ralston18]

Will the system boot into Safe Mode?

Power down, unplug, open the case. (Get help if needed.)

Clean out dust and debris.

Verify by sight and feel that all connectors, cards, RAM, and jumpers are fully and firmly in place.

Are you able to borrow another known working PSU to test in your system? Remember: do not mix and match cables between existing PSU and the test or even a new PSU.

 

[sonofjesse]

so when it shuts back off is the whole PC shutting down or just losing the video signal?

Of course I would test with another power supply if you have one.

Have you made any changes? Have any people/kids spilled something on it etc?

 

[TommyTwoTone66]

Was the CPU overclocked? You might find removing the battery from the motherboard for 10 minutes to reset to factory settings helps.

 

[Giannis_Mag]

The easiest way to find out the source of the problem is to test with different parts. Ask a friend to test his parts one by one and see.

Does the pc turn completely off after the split second? When you press the power button, do you see any activity? Do the fans spin? If yes, its means that you dont have any of output.
The most likely to be dead is the PSU. Since mb's RGB is still on, it means that something fails under the operation's load.
If the fans spin, then its probably a RAM, motherboard or disk problem even the disk.