Question PC boots but no display

[Smux.]

RGB on pc shows but no display on monitor, all it says is ‘No Signal’.

 

[Nemesia]

Full system specs including brand and model.

 

[Smux.]

(Custom build)
CPU - i3-8100
GPU - RX 570
Motherboard - ASUS H310M-K
Windows OS - 1909 or -03 (can’t remember.)

 

[Nemesia]

(Custom build)
CPU - i3-8100
GPU - RX 570
Motherboard - ASUS H310M-K
Windows OS - 1909 or -03 (can’t remember.)

PSU and RAM?

 

[Smux.]

PSU and RAM?

PSU -550W PSU ALLIES (A550W)
RAM - Corsair Vengeance LPX DDR4 3000MHz

 

[Marraxo]

is it a new monitor? or a new gpu?
Try switching ports and inputs(hdmi for dp or vice versa)
If its DP check is it is well connected. press the cable until its firmely secure.
Also check if the monitor is recognizing the right input. If its not auto detect you have to switch between inputs( hdmi or DP). My monitor is manual for eg.
I had similar problem when got a new monitor and it was faulty gpu. The displayports didnt work. It worked well when connected with hdmi(but no gsinc) but when i switched to displayport, got the same as you ‘No Signal’.
Hope this helps

 

[Smux.]

It’s not new and I’ve already tried different cables and mointors. Right before it happed tho my pc booted to the ‘Press F2 or DEL to go to bios’ but there were green spots everywhere