guys this happened again tonight. The monitor went black and I had to turn off the PC from the case. I turned it on right away again and it was fine except there was no screen at all so had to use the power bottom to turn it off.
Then took the graphic card out again and did some cleaning and replaced everything. Now it doesn't turn on at all (((
I mean you hear the 1second sound of fan but it doesn't turn on!
It's weird that both graphics card and power system are failing at the same time