Computer turns on, has black screen then shuts off

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Ive had a problem recently with my computer. Whenever in use, especially during games, it would shut off from what I think is over heating. It would turn on after I tried booting it though, but now it does not even boot fully (only for around 10 to 15 seconds) and the screen is completely black. Ive swapped the graphics card which didnt do anything, tried booting with 1 stick of ram to see if any individual ram stick is causing this issue and that didnt do anything. I even removed the psu and tested it to see if that was the problem and the psu worked fine. Im really confused as to what could be causing it and how to solve this.

Any help is appreciated.

Please help.

Thanks!

I didn't find the right solution from the Internet.

References www.bleepingcomputer.com/forums/t/540209/computer-turns-on-has-black-screen-then-shuts-off-after-around-10-seconds/

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