Re: Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
Should I heat up the board by itself or plugged in to the PS board?
Do I heat up the whole board or sections?
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Re: Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
"When the power board is connected, something from the main board shorts all power - measure the voltage on the PS board and I get nothing (with the MBoard connected), unplug the main board and the voltage on the PS board reads 24v, as it should." That is because the main board is forcing the PS_ON to go low and not allow the power supply to turn on.
I use hair dryer to heat up the board.Leave a comment:
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Re: Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
Yes, I see the legend on the PCB, but there aren't any numbers near the pins to say which is Pin 1, etc.
I'm not sure if they go: 1, 2
3, 4
or
1
2
3
4
etc.Attached FilesLast edited by beedoola; 12-07-2014, 02:50 PM.Leave a comment:
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Re: Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
The pin out is just right of it.
Please upload photos to this site or to IMGUR as I cannot view full image on photobucket.Leave a comment:
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Re: Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
Can someone tell me the Pinout of this connector on the main board?
When the power board is connected, something from the main board shorts all power - measure the voltage on the PS board and I get nothing (with the MBoard connected), unplug the main board and the voltage on the PS board reads 24v, as it should.
I need to know the Pinout for the main board so I can see if I can track down the short.
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Re: Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
You can do some real good visual inspection and check some voltage readings on the voltage regulator IC and that's about it.
Did you try heating and cooling of the main board yet?Leave a comment:
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Re: Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
anyone?Leave a comment:
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Samsung LN32C540F2DXZA: Won't turn on, PS and Inverter OK
I have a 32'' Samsung. The power supply voltages test fine and when I connect the PS board to the Backlight inverted and plug give it all power, the backlight comes on.
When I hook up the main board back up with the PS and Inverter, I get nothing.
Blinking red light on the front panel.
Is the Main board just toast, or is there anything I can do to troubleshoot it?
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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 -
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 -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"...
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