See if that resolved it since a bad cable box can sometimes cause a dark screen as well.
Then plug one video source (preferably a local DVD/BR or Game console)in and plug the TV in, restart.
Unplug your TV, unplug all devices that are plugged into your TV and then hold the power button down for about a minute or so. If you cannot see anything (triple check) then it is possible that this is a bad main board or a bad t-con board as wella s the panel (unlikely but possible) 4K HDR Roku Smart TV 55S423CA TCL has actually launched two Roku models in. Buy Refurbished TCL 55' Class 4K (2160p) HDR Roku Smart LED TV (55P605) at. Had post on Best Buy reviews but they removed it. You will have to remove the back from your TV and check the power board with a multimeter Post some good images of all of your boards with your question so we an see what you see. TV screen looks I have the same issue, either turn off HDR on your Xbox or. This tv has been omitting Burning varnish chemical smell for 4 days now. This may require replacing the LCD strips inside the panel or a new power board. If so you know that your backlight is not working. 55P605 TCL 55 Inch Class P6-series 4K Uhd Dolby Hdr Roku Smart Tv Encompass. Then us a flashlight and shine it at an angle against the screen see if you can make out shapes silhouettes etc. In the Xbox One X display settings, ensure you have 'color depth' set to at least '30 bits per pixel (10-bit)' to enable HDR. I don’t comment on these forums at all but I felt the need to disclose this discovery so no one gets screwed. Marlon Manyweather in a darkened room turn the TV on to a channel where you have sound etc. Verify that your TV is capable of HDR by going to the Xbox One X display settings and open '4K TV details'. They claim to offer a 90-day limited warranty from TCL however when you look at the fine print on the warranty it seems to clearly state that anything in a factory reconditioned format is not covered.
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