Black screen issue, but only intermittently
Hello, I’ve seen other posts about the black screen issue on TCL TVs, but mine is a bit different. I have a 55S405 purchased in 2017. As others have described, when I turn on the power the screen is typically black but audio works fine. However — I can get it working under some circumstances. Powering on the TV via a connected CEC input device works 50% of the time. AirPlaying something from my iPhone works 75% of the time. But simply powering on from the TCL remote almost never works.
When it does work, the picture is normal, full brightness and full color. However, there is usually a “double image” — a faint outline of the proper image, duplicated and shifted about 2 inches to the right. It’s mostly visible when standing close to the screen and higher up.
I have tried rebooting, unplugging for several hours, factory reset via the software menu, and factory reset via the reset switch on the back, to no avail. I’ve seen other answers suggesting the black screen is due to failed LED strips. However, in my case the screen clearly does work, at least to some degree. Does anyone have suggestions for boards etc. that I should try replacing? Thank you!