Hi to all, I am currently in the process of repairing a TH-50AS700A TV (Australian model). It has the 13-blink code and so far what I have done was a visual check of all the boards and connectors for obvious damage but there was none. The part number of the main board is TNPH10771 A. I tried to reflow the main board but still the problem remains. I am now looking to purchase a used main board but one of my online sources do not have it in stock. I have found one with the same part number but it is for a TH-60AS700A TV. Will I be able to use this main board without any problems?
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Re: Panasonic TH-50AS700A
Hi there. Same problem! Turns on but blank screen, no sound, just the blinking light?
Did you get anywhere? -
Re: Panasonic TH-50AS700A
Hi, I have set this unit aside because I still have not found a used mainboard with the exact part number. Although I might gamble on a mainboard that is not exact...I will post when I will have done this.Comment
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Re: Panasonic TH-50AS700A
Do you need a TNPH1077 1 A board? That's what is marked on mine.Comment
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Re: Panasonic TH-50AS700A
Yes, my board is the TNPH1077 1 A. I have seen lots of boards with this model number but the smart card slot on them is populated while on mine it is not. It may be a common board for Panasonic TVs, differing only in the firmware depending on the region the TVs are sold.
There is a also an area on the board that is marked as "suffix". They could very well be configuration jumpers.Comment
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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 -
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"... -
ONN 100012588
Issue: No Power, Then Rebooting After Main Board Change
Short answer: replace main board and power board
Technical answer: replace main board and Q306 & Q307 on power board.
Long answer:
TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge.... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
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