Edit: well, had to reset defaults, fixed after that.
Hello. in recent days I've updated my LG OLED65CXRLA to 03.23.35 firmware, after that HDR won't work at all.
I own this tv since February, and never had any issues with it, and for the first time I've encountered problem and serious one at that,
Before said update HDR worked without any issues from any source - PC, PS4/Xbox, TV's apps like YouTube and Plex. After update HDR doesn't work from any of said source.
How it happens: when I launch any HDR content, tv blicks, in upper right corner appears HDR notice, but picture becomes very dark. It's the same as if for example you try to run any YouTube's HDR clip on display without HDR support.
I have a 50NANO79SNA, built in 2020. After ignoring the message for some time I finally decided to allow it to do an automatic firmware update. Started the process then went to bed.
In the morning the TV appeared to have hung up - it was turned on but had no picture, no audio and did not respond to the remote. I turned the TV off using the manual power button then powered it back on... I got the LG power-on sound, but again no picture. Powering it off then back on again resulted in no sound, no picture and a power light that flashes 3 times each time it turns on. It does respond to the remote (for power on/off commands.)
Is there a way to force-reload the firmware over USB if you don't have a picture?
UPDATING YOUR FIRMWARE
The firmware that powers your LG Ultra HD 4K Smart TV with webOS should be updated from time to time to enhance your experience and improve its operation. Thankfully, this can be done easily and quickly, right at home.
Watch this quick video to learn more. Or follow the easy steps below to get started.
HOW OFTEN DO I NEED TO UPDATE MY FIRMWARE?
Firmware updates don't happen frequently, so you should be fine checking for updates every other month.
HOW DO I CHECK FOR, AND DOWNLOAD, AVAILABLE FIRMWARE UPDATES?
Before you do anything, make sure you have an Ethernet cord connected directly from your router to your television. Wireless Internet connections are not reliable enough for firmware updates.
Use this diagram if you need help getting set up:
ONCE YOUR TV HAS A WIRED CONNECTION, DO THE FOLLOWING:
Press the MENU Click SYSTEM SETTINGS Then ABOUT Then SYSTEM UPDATES You'll be advised that your system is currently up to date or requested to select CHECK NOW for the latest update. If a new version is available, it downloads automatically. FIRMWARE UPDATES WILL ALSO UPDATE LG ULTRA HD 4K SMART TV AND LG APPS AT THE SAME TIME.