Computer suddenly didn't display

[AStarRahimi]

I was working on my PC and suddenly my pc monitor wasn't displaying on my new 165hz monitor. I game on 144hz HMDI using APU only, waiting for Graphics card. I swapped HDMI with my security monitor one and it didn't work. After, I took the cable for my monitor off the socket and placed it back in, and done the same to the monitor plug. I want to know what maybe happened because when I swapped HMDI it didn't work first and my mouse and keyboard didn't light up. After taking plugs out and putting it back on it worked?

Any idea what happened so that maybe I can avoid it?

 

Ryzen 3 2200G
ASUS PRIME A320M-K
Corsair CV650
UpHere 3 RGB 120mm fans, via SATA Power Connector to Lighting Node (6 Pin)
1 RGB back fan, via Molex Connector, never had problems with that though.
165Hz iiyama IPS Monito, 144Hz HDMI, used the one supplied in box
120GB SSD Sata
480GB SSD Sata

 

Ever since I put my new UpHere RGB fans the problem has started? I don't think it's my monitor anymore, after testing, and think that it might be my pc. It turns on, just the mouse and keyboard doesn't for some reason sometimes

[AStarRahimi]

Thank you very much. Might as well wait for my GPU to come and play via DP. Btw my pc is iiyama G-Master G2470HSU which I got from Box for £154.99.

[LogicalDrm]

-> Moved to Troubleshooting