Facing TV Problems? Ask a TV Technician.
Hello, What "board to the right" are you referring to- can you post the part number?
Also, does that reed light ever change color? Does it ever blink?
Does your screen ever light up even for a second?
Thank you. So what does the red light do AFTER the power button is pressed- does it change color, blink- anything?
Okay, please unplug the set from power then disconnect the Z Sus board (the one you hear the noise coming from). Then plug the TV back into power and press the power button once. Let me know what the power light does, and also if the screen attempts to light up- even for a second.
Do you have a multi-meter?
Okay great. With the meter set to DC volts, you're going to ground the black meter probe to the metal frame of the TV, then with the Z SUS disconnected, use your red probe and test the points labeled "VS" and "VA" on the power board. You should have 200 and 55 volts DC respectively after you press power once. Let me know what you find.
Hmm, okay. This is with the Z SUS connected, or disconnected?
Okay, unfortunately I have to run for the night, but will open the question to other experts in the meantime.
Suspect the left or right board may be shorted to ground. Vs power line is attempting to power up both boards at the same time, and shutting down the Vs power. To test, measure the Vs line to ground, see if a resistance measurement is BELOW 2000 ohms with the power / left board - Ysus /right board - Zsus all connected together.
If there is a short, you'll read way below 2000 ohms / 2k ohms.
If that's the case - Keep your meter on the VS power plug, disconnect either the left or right board and see if the VS resistance shoots up above 2000 ohms. If so, double check the disconnected board's VS pin for a direct short.
Either VS line will work to ground - which is the metal frame when ALL boards are connected.
IF you unplug the BOARD -- it's best to use the PIN plugs marked VS and GND for ground.
whole power board unplugged i can get 020 ohm from vs to ground --I don't know which board you read that on, but it's shorted.
nothing near 2000k
Careful how you print that...that's 2 million ohms. If a board reads 2000 ohms it's not shorted.
You're confusing me.
ALL boards will BEEP continuity for a GOOD 30 seconds. Eventually they go OL on continuity Testing.
All boards start out with LOW resistance but are supposed to climb above 2000 Ohms if they are ok.
Bad boards never do.
I do suspect your Ysus is likely bad since it shuts off the power so fast. Check it with the rules I listed above
With my meter set to dc volts with zsus board disconnected when i power the tv up i have 55volts at the va and 200 at vs
If those voltages stay on...then that means the short is not connected.
It is a fuse that is on the zsus board. The fuse it blown
Don't try to replace that fuse, replace the Zsus board. Replacing the fuse will just blow the fuse a 2nd time and possibly damage the power supply board.
If you have a soldering iron and are skilled with it --
I'd call that company and ask if that kit has an instruction and part location sheet included with it. Those small parts....I'd test the originals first, see if they MUST be installed. Nothing like losing a tiny part like that.
Me too. If you have a choice of sending it to repair it, I'd take that over doing it yourself.