Hi All,
I picked up a Samsung UN65RU8000FXZA 4k Smart TV a few weeks ago, in hopes I could repair it and get it working. It was purchased in Nov 2019, Samsung already replaced this tv by the original purchaser.
I have eliminated the main board and power supply, and back lights are working. It was cycling on and off when i got it, I disconnected ribbon cables until I pinpointed it down to an LED driver board, and with the suspect board or ribbon cable section, 3/4 of the TV will now stay on and it no longer cycles on and off. I haven't found any shorted capacitors on the board. I did find a few threads that said capacitors shorted can be a common issue on the 8000 and 9000 series samsungs.
I have eliminated power board and main boards by using shop jimmy replacements previously, and measured my 13Vs and 3.3V outputs on the power supply connected to the main board and disconnected as well.
Some of the 3.3 voltages drop out with all the LED driver boards connected, obviously causing the on off cycle. This stops with a small ribbon cable 69.75T11.T02 (jumper) removed.
The main board Number: BN94-14163D
Power Board Number: BN44-00932M
LED Driver Board Number: BN96-48077A (4 boards)
I'd primarily appreciate any info or tips for troubleshooting the other chips on the board. The driver board has a part labelled 6514P and a uS5506P chip that I haven't really been able to identify. It would also be great if I could see what the capacitors values should be so I can check they measure what they should. I have also seen threads with people cutting or lifting the ribbon cables and successfully getting the section of the panel back working. I will get pictures uploaded as soon as I can.
Thanks in advance! Let me know if I can get any more info.
I picked up a Samsung UN65RU8000FXZA 4k Smart TV a few weeks ago, in hopes I could repair it and get it working. It was purchased in Nov 2019, Samsung already replaced this tv by the original purchaser.
I have eliminated the main board and power supply, and back lights are working. It was cycling on and off when i got it, I disconnected ribbon cables until I pinpointed it down to an LED driver board, and with the suspect board or ribbon cable section, 3/4 of the TV will now stay on and it no longer cycles on and off. I haven't found any shorted capacitors on the board. I did find a few threads that said capacitors shorted can be a common issue on the 8000 and 9000 series samsungs.
I have eliminated power board and main boards by using shop jimmy replacements previously, and measured my 13Vs and 3.3V outputs on the power supply connected to the main board and disconnected as well.
Some of the 3.3 voltages drop out with all the LED driver boards connected, obviously causing the on off cycle. This stops with a small ribbon cable 69.75T11.T02 (jumper) removed.
The main board Number: BN94-14163D
Power Board Number: BN44-00932M
LED Driver Board Number: BN96-48077A (4 boards)
I'd primarily appreciate any info or tips for troubleshooting the other chips on the board. The driver board has a part labelled 6514P and a uS5506P chip that I haven't really been able to identify. It would also be great if I could see what the capacitors values should be so I can check they measure what they should. I have also seen threads with people cutting or lifting the ribbon cables and successfully getting the section of the panel back working. I will get pictures uploaded as soon as I can.
Thanks in advance! Let me know if I can get any more info.
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