I have a TV where the relay on the power board repeatedly clicks on and off when AC power cord plugged into outlet. I need the main board connected to the power board to see if the low voltage (3.3 or 5V) to the relay is constant. With all other boards disconnected and with the main board (BN94-02855F) connected to power supply board, the relay constantly clicks on and off. I inspected all other boards and no signs of bulging capacitor issues on any of the boards. There is another forum for the Samsung 50" plasma PN50A550 where they identified a tantalum capacitor C102 on the main board that fixed many clicking on and off TVs but have not come across anything online regarding a fix for this model. The main board on this model is different for the PN50A550 main board. Anyone out there with similar issue? Any information appreciated. Thank you!
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Hi everyone,
Im looking for some advice regarding my Samsung UE55MU8000 TV with main board model BN94-11606C. The TV suddenly stopped turning on and now shows no signs of life at all not even the standby light at the bottom.
Initially, I suspected an issue with the PSU, so I took it to a repair center. They tested it and confirmed that the PSU works perfectly, even on other TVs. Based on that, I started investigating the main board.
I disconnected the main board from the PSU, and the backlight turned on, which seems to confirm the main board is the issue.... -
Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this... -
Hi everyone,
Iām looking for help with a persistent issue on an LG TV model 55NANO77SRA, which uses the main board EBU66792103 (also used in LG UQ80 and NANO75/NANO80 series).
š§© Problem Summary:- The TV keeps scrolling through the menu or selecting items by itself.
- I removed the physical button board (the entire panel with power and volume buttons) and also disconnected the flat cable (CN202) from the main board.
- The remote control is not in use (batteries removed), and the TV still shows the same behavior.
- I
07-28-2025, 08:34 AM -
Hello forum!
This is my fourth post so I will try to start on the right foot by doing it properly right off the bat. I bought this plasma faulty to play around with. The main board is completely burnt. When I unplug everything but the power supply and the main board and I plug in the power chord I get plenty of smoke from the main board.
Now, the model of the TV is a bit of a detective work. I couldn't find the model of the TV anywhere on the back cover or inside so I deduced it from the main board codes. SO I THINK this is PS50Q97.
Now, since the board is... -
When plugged in it will click and cycle the BL on and off, no pic and does not respond to remote. When I disconnect the cable from the PS board to the main board and then plug it in the BL will come on and stay on. There are only two boards in this set, the LVDS cables from the panel driver boards connect directly to the main board. Since the BL comes on and stays on I'm thinking the PS board is ok and the problem is on the main board. Should I order another main board or do I need to do more testing? thanks, Lee
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