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Why is my Philips TV screen is so dark?

Why is my Philips TV screen is so dark?

Hi,

ANSWERS:

"Patrik Bajusz  that will depend on how dark is dark. If your backlight have totally failed you will usually need a flashlight etc. toe even make out shapes or silhouettes. In your case it could be a power board not supplying enough voltage to the backlight LED’s or, based on this “once I touched the bottom center of the tv (the frame) to lift it up, the whole display worked fine just for some seconds. “ some loose connection to the backlights. Check all of your wires by reseating them. Check the boards for cold solder joints. There is also a slight possibility that this is the T-con board since it could be a failed Gamma IC which could darken your screen.

Update (01/10/2020)

@Patrik Bajusz post another picture showing the whole display. The #1 picture does not give us a good overview. Did you check the connections as suggested in my original answer? What did you find? What voltages do you get on your LED connector on the power board? We also need to see all of your boards not just a single connector. Help us to help you.

This ""Sometimes the lower third of the screen is works fine for 1-2 minutes and than goes dark. "" by itself sounds like some bad backlight strips.

Update (01/10/2020)

Patrick Bajusz this ""voltages on the power board are 37.8 V"" looks a bit low. It's easiest to replace a bad power board. If that does not fix it you know its your backlight array and you will have to replace those by dismantling the LCD panel"

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