Question No display after lots of troubleshooting ?

Nov 4, 2020
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Hello guys, I need some advices, so here is my problem:

One night I turned on my computer and it booted fine. but then suddenly the display was gone so what I did was turned it off and reseated the ram. still no luck and no display. after that, next morning i resetted the cmos and it worked fine but right after i turned it off, i wouldnt get display anymore. sometimes I will get to use my pc without problems, run some stress test, test the ram cpu,gpu and none showed any error

what I did so far is tried a different PSU and GPU, but still the same problem. sometimes the computer would cycle 3-4 tmes before running. these things happen even if try different psu so I assume we can take the PSU out of the problem?

any advice would help me. thanks in advance