what is the cause of issue here,monitor,motherboard or GPU?

frozensun · May 4, 2021

Hellow guys,

So I was kinda patient with this issue but recently it started to get on my nerves a lot.

I get this issue since I bought this monitor.

So I own "unlucky" Samsung CJG 50 32 " monitor which has display port and 2xHDMI inputs.

My 3 current PCs are hooked up to HDMI1, HDMI 2 (supports 144 Hz) (the one on the video) and DP.

Whenever I turn on second PC which is hooked up via display port I don't have any issues,monitor auto turns ON and I get picture.

But when I turn ON the PC which is hooked up via HDMI 2 and want to go into BIOS here is what happens (look on video).

So basically it doesn't detect source/graphics card signal at all,even when manually selecting HDMI via button on monitor (the one I pressed on video).

So I basically need to turn OFF PC and turn ON it again which is odd so I can get ROG logo and picture on monitor.

This happens each time when I want to turn ON second PC via HDMI 2 port,when the first PC was working previously via DP

But lets say I only use this second PC via HDMI 2.I do get picture each time when I just turn ON this PC for like today,tomorrow,the day after tomorrow.

That is okay if this was the only PC used on monitor.

Immediately if I turn ON first PC via display port it somehow confuses monitor each time I change PCs,so every time I need to select manually the input source which is HDMI 2.

All settings for monitor are set to AUTO detect source,and for some reason I don't get automatically picture via any of the HDMI inputs but only via display port input.

I should RMA the monitor but this fault is kinda hard to prove,so I kept it,but I wonder should it suppose to work like this or I'm having issue with something.

What can cause this issue,and I can do something to repair it?