F5F Stay Refreshed Hardware Desktop TCL UHD TV changes from PC-style display to 4:2:0 compression during video playback.

TCL UHD TV changes from PC-style display to 4:2:0 compression during video playback.

TCL UHD TV changes from PC-style display to 4:2:0 compression during video playback.

U
UglyMuffinz
Member
167
03-12-2022, 01:28 PM
#1
I've been using my 43" TCL for about five years. Recently, I've experienced random quality drops. Sometimes the screen goes black briefly. I think this might be linked to video playback, possibly due to a DHCP handshake altering chroma subsampling from 444 to 420. Small actions like opening a Firefox window with YouTube between monitors can drastically affect quality, then sometimes it recovers when switching displays. All three monitors are calibrated using an i1 Display Pro, and the subsampling problem also seems to reset their calibration profiles. Resetting the GPU driver brings everything back to normal. The nvidia control panel settings don't reflect any changes, and tweaking options and reverting them works temporarily. My other two traditional displays aren't affected. Updating drivers hasn't helped in months. Photos taken in Windows don't show any difference during outages, so I'm sure the issue lies with the GPU or display hardware, not with how Windows renders or changes resolution. Nvidia 3090ti with studio drivers TCL 43S405 via HDMI Viewsonic ColorPro VP3268 via DisplayPort BenQ GW2480 via HDMI on Windows 10 Pro AMD 5900X 64GB RAM
U
UglyMuffinz
03-12-2022, 01:28 PM #1

I've been using my 43" TCL for about five years. Recently, I've experienced random quality drops. Sometimes the screen goes black briefly. I think this might be linked to video playback, possibly due to a DHCP handshake altering chroma subsampling from 444 to 420. Small actions like opening a Firefox window with YouTube between monitors can drastically affect quality, then sometimes it recovers when switching displays. All three monitors are calibrated using an i1 Display Pro, and the subsampling problem also seems to reset their calibration profiles. Resetting the GPU driver brings everything back to normal. The nvidia control panel settings don't reflect any changes, and tweaking options and reverting them works temporarily. My other two traditional displays aren't affected. Updating drivers hasn't helped in months. Photos taken in Windows don't show any difference during outages, so I'm sure the issue lies with the GPU or display hardware, not with how Windows renders or changes resolution. Nvidia 3090ti with studio drivers TCL 43S405 via HDMI Viewsonic ColorPro VP3268 via DisplayPort BenQ GW2480 via HDMI on Windows 10 Pro AMD 5900X 64GB RAM

D
DavidDM
Junior Member
5
03-19-2022, 12:19 AM
#2
Check your TV with another computer to determine if the issue comes from the PC or the TV itself. Given you used it for a long time without problems, an automatic update might have affected your system—whether it's a Windows or driver update. If the TV is the source of trouble, unless you can modify settings in its menu, consider reaching out to TCL support to check if repairs are possible and their associated costs.
D
DavidDM
03-19-2022, 12:19 AM #2

Check your TV with another computer to determine if the issue comes from the PC or the TV itself. Given you used it for a long time without problems, an automatic update might have affected your system—whether it's a Windows or driver update. If the TV is the source of trouble, unless you can modify settings in its menu, consider reaching out to TCL support to check if repairs are possible and their associated costs.

_
_Wild_Dog_
Member
170
03-20-2022, 07:24 AM
#3
I discovered the answer! The Nvidia control panel automatically adjusted the display based on the detected content type. My adjustment was simple. On the left side of the panel, navigate to Display, then select Adjust desktop color settings. At the bottom of the main interface, find the option "Content type reported to the display:" and change it to "Desktop programs." This ensures full quality throughout. Previously, my setting was set to Auto, which caused a poor "Full-screen videos" mode during playback. After changing it, the resolution remained stable for several weeks.
_
_Wild_Dog_
03-20-2022, 07:24 AM #3

I discovered the answer! The Nvidia control panel automatically adjusted the display based on the detected content type. My adjustment was simple. On the left side of the panel, navigate to Display, then select Adjust desktop color settings. At the bottom of the main interface, find the option "Content type reported to the display:" and change it to "Desktop programs." This ensures full quality throughout. Previously, my setting was set to Auto, which caused a poor "Full-screen videos" mode during playback. After changing it, the resolution remained stable for several weeks.