I don't know if anyone else has this monitor but maybe someone has had similar issues with other Korean monitors.
So basically what my problem is, my HDMI 2.0 port is not working correctly. Plugged into my PC(GTX 980) or Chromecast Ultra it takes an input of 1280*[email protected]
This is after I broke it somehow.
Before I have plugged in a PC in the past and got 3840*[email protected] on the HDMI2.0 port though I didn't used a HDMI 2.0 cable.
With the Chromecast Ultra he HDMI 2.0 never did 3840*[email protected] before properly(it would be missing 2 horizontal pixels so 3838*2160, which would cause this line across the screen in random places every time I switched sources).. I never tested HDMI 2.0 off my PC before I had my problems unfortunately.
What I did to sort of fix the that problem was set the Chromecast to 50hz and the 2 pixel line across the screen would go away though it would still show 3838*[email protected] in the menu.
Okay so what I did to break it was I had both my PC plugged into the DP1.2 and the Chromecast Ultra plugged into the HDMI 2.0. While have the PC as the main display I activated PIP for the first time with this monitor. This is where everything got weird. So it went small and I watched an episode of Seinfield on the PIP screen which using my computer. When I went to play around with PIP setting I swapped the screens and the little PIP screen actually reduced my PC resolution to 1920*1080 BUT my Chromecast was a tiny little box in the middle of the screen at 1280*720.
I then turned off PIP and set the Chromecast as the Input Source only and it was still a little box 1280*720 in the middle. Okay so this was weird, I turned my TV off and on, restarted the Chromecast. Still the same. I then pressed reset in the TV menu and the Chromecast went back to full screen BUT it was still 1280*720. Nothing fixed. I later figured my aspect ratio must have just been 1:1 before I reset the settings so this paragraph is mostly irrelevant.
I now have an HDMI 2.0 cable so I plugged my PC into the same port the Chromecast was in(HDMI2.0) and only got 1280*720 as an option in the display settings. I tried Custom Resolution but it just showed nothing.
The problem is also unique to the HDMI2.0(HDMI1) port only and HDMI2, HDMI3, and DP1.2 are working perfectly normal.
I've tried looking for this problem online but couldn't find anything. Since the HDMI 2.0 didn't work with the Chromecast Ultra properly to begin with the TV might just have some fault unique to my unit. Or maybe just this model specifically but just hardly anyone has it and done exactly what I did to have this happen to them.
Chromecast Ultra HDMI1:
Chromecast Ultra HDMI2:
EDIT: First time using these forums, don't know why the formatting is so weird.