Oh wow I feel stupid not installing the cpu.
So, I did everything I was told in this thread and it actually booted somehow. I couldn't pin point the exact problem, but I think it was a multitude of things combined that made my system behave that way.
Last thing I did was putting the ram in...
Only 1 ram module installed
USB/Audio headers disconnected
GPU disconnected
24+8 pin connected
HDD + M2 disconnected
1 CPU fan connected, all other fans disconnected
System does the same thing.
Edit: Also took the motherboard out of the case
View: https://imgur.com/a/gS79WXF
When I press the power on button, the system starts for a second, all fans start spinning (cpu cooler, gpu,psu, case fans) and then it just shuts down. I replaced my psu with a new 550w one which is better than my old 450w but I still have the same issue.
Things that I have tried that did not...
I recently swapped from an Asus 24" VG248QE gaming monitor which is 144hz 1080p display. I've had no problems with it for about 4-5 years that i've had it and some white horizontal lines appeared after a while and so I decided to buy a new one.
The monitor i've bought is a DELL S2721GHF 1080p...