Question My pc turns on but there are no displays on monitor and turns it off immediately

Dec 28, 2023
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Hi so I'm new here

Basically I'm already experiencing this problem for awhile now.
This first happend when I left my pc to go to another place for my summer vacation
Once I got back to it, my pc won't boot up
It does turn on tho but the windows startup dosent pop up nothing even pops up not even american megatrends
And then for a few minutes/seconds it turns off automatically
Also I suspect that my cpu is overheating because when I touch the heatsink, it feels hot, it turns off immediately without displaying something. This also happens on Christmas day again and still didn't know why it does this
Any help