Why is my Philips TV screen is so dark?
I've got a Philips 50PUS6162/12 UHD smart led tv and it's brightness has become very low this week. I mean I can see the menu, broadcast etc. but only in a dark room. The brightness is set to maximum in the settings and I reset it to factory settings as suggested but nothing changed. Sometimes the lower third of the screen is works fine for 1-2 minutes and than goes dark. I've measured the voltages on power board and they seems to be correct (as googled for some standard voltages). I've read that it may be T-Con that is causing the problem if led strips works, power seems right and every other thing seems good.
The warranty has just expired so please help :)
Thanks for your advices. In this case dark means I can see the picture when (at least) there is twilight in the room or I cover the screen from reflection.
It’s brighter on the picture than it really is. (My camera overcorrect brightness).I checked all the connectors, and reseated the wires. I also checked the boards for cold solder soints, bloated capacitors etc, but everything is good. I measured the voltages on power supply and the strip voltages are 37.5-38 V on every pin. The other connector (the upper) voltages must be 12 V and 3.5 V according to the inscription but there is nothing on 3.5 V pin. That is the only fault.
So I still don’t really know what’s wrong with it.
Thank you @oldturkey03
I took some pictures as you requested.
I took two pictures of the display, one at daylight and the other in a darkened room, to see the difference.
I checked the connectors and reseated all of them but nothing has changed.
All of the LED connector voltages on the power board are 37.8 V.
I also made some pictures of the boards:
If the backlight is faulty, may all the LED strips go wrong at once?
So after T-con, I replaced the power board too, but it’s still the same. Dark... Voltages are similar to my original power board so I guess it isn’t faulty.
What’s next? Should I disassemble it completely to the led strips, and power them manually?
Cette question est-elle utile ?