Chosen Solution

I have a Finlux 50fpd274b-t. The other day after turning on power the left hand side of the screen brightness was darker than the right. I switched off power for 30 seconds and switched back on again. The screen seemed great but after about 30 seconds it went black and still had sound. Repeated again and same thing happened so disconnected and left switched off for 3 days. Today plugged it back in powered up and the screen is staying on but now the right hand side of the screen is darker than the left. Any ideas on possible causes and possible remedies? It’s being used with supplied stand and I’ve tried updating software and adjusting picture settings with no success. Thanks in advance * Update (05/21/2020)

Update (05/18/2020)

@chapsy02 its a bit of an Off-brand model so there is not to much information readily available. Commonly those failures are either because of a bad backlight array (LED strips inside your panel) or a bad power board. You do want to remove the back cover (unplug your set) and check the power supply. You will need a multimeter to check the voltages going to the LED’s. Post some good pictures of your boards so we can see what you see and hopefully help you out further. Adding images to an existing question Update (05/23/2020) added power board schematic