LG 27UK650 no display

[jwong1421]

Was using my monitor when suddenly it just turns black. It doesn't say no signal, but it is detecting the HDMIs because when I switch to them, there is backlight. I can still use the power button to access the settings and everything, it's just that there is no display.

I tried using another monitor on my PC and it works, as well as another HDMI cable. Also tried with my PS4 Pro. Same backlight, no messages.

 

[jwong1421]

MERGED QUESTION
Question from jwong1421 : "Monitor has no display, only backlight."

My LG 27UK650 suddenly went black while using. It only has the backlight, no error messages, no 'no signal' message. Sound and buttons on the monitor still works.

I tested a different monitor with my PC and it worked so it's definitely the monitor. Tested a different HDMI cable and tested my PS4 on it and same result, backlight.

Since there is a backlight, I assume it's not a power supply issue and a hardware issue.

Any ideas what specifically it can be?