You gonna sell a tape TV?
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This one was more or less a proof of concept and personal achievement 😄
The ones I DO sell I've either replaced power supply components, boards, or most commonly, backlights. On rare occasion I get one that has nothing wrong with it at all.. And those are the ones I can't guarantee anything AT ALL.
But as far as used TVs go, they're just the same as used cars. You can put a new transmission in a car and sell it but 6 months later a head gasket goes. I may put a new power supply in a TV but I can't guarantee that the backlights won't fail next week. That's why I will honor my work and my customers for a respectable length of time.. but obviously not forever.
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I don't have a picture of what I did. What I suggest is you find the clock signals yourself and then block them with tape. The way I found them was by looking at the main board and finding the labels near the ribbons. When I found CLK1 thru CLK8 (I believe it was) I followed the trace to the ribbon connector. Using a multimeter in continuity, place one probe on the the pin of the connector and run the other probe along the pins of the opposite side of the ribbon (the end that plugs into the strips on the panel) until you hear a beep. When it beeps you've found where that signal comes out on the other end. All you need to find is 1 and 8 then everything in between those are the remaining signals. Start by putting tape over all 8 and see what happens.
This is assuming your multimeter BEEPS when continuity is found.Comment
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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... -
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.... -
This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.
I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match... -
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....
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