Question No display

Jan 16, 2022
Hello everybody,
My PC was just working fine, I built it a year ago and had no problems with it until today.
I was just playing a game, and then went to drink something and turned my PC off.
When I came back when I tried to power it on, my PC didn't output anything. Also the LED's on my keyboard don't turn on.
The monitor says "No display", it doesn't even output a black screen. The BIOS also doesn't show.
These are things I've tried:
  1. Checked with another PC if the cable or monitor is faulty. And it worked just fine.
  2. Ensured that the cable was inserted into the graphics card and not the motherboard.
  3. Changed position of RAM sticks, tried with just 1 stick.
  4. Removed the CMOS battery, held the power button for 20 seconds then waited 5 minutes to put it back in.
  5. Tried my friend's GPU, didn't change anything.
  6. Reinserted the GPU & cables.
  7. Reconnected the motherboard cable and CPU power cable
  8. Tried using DisplayPort instead of HDMI
  9. Unplugging Wi-Fi Card
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Corsair DDR4 Vengeance LPX 2x8GB 2666mHz C1