Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound

[crt man]

Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound

Now the crazy part, if I disconnect the ribbon cable from the main logic board to the y-main, then the power supply voltage and y-main voltages are correct. Should I connect the y-main and x-main with the ribbon cable unattached, then the tv still will not power on. I'm at a lost on what exactly could is wrong or where to go from here. Anybody else been through this or know where I should start?

Hi.
When I disconnected the ribbon to the X main, I killed the Logic board
causing the relay to click four times. See if you have a led on the logic board
and if you have it should flash about once a second anything other you will have probably killed it .

In general what I found was the Y buffer shorted taking out two FET'S the X main replacing these restored the TV back to normal order.

HTH.

Alan.

[capkid]

Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound

Odd behavior. I'd try testing some of the Y-main and X-main components with the boards out of the TV. In some of these thin Samsung plasmas, the transistors on the heat sinks will test shorted.

Edit: As you noticed, the Y-main and X-main are chained. Doing a single board swap can sometimes result in a bad board killing a good board, leaving you in an infinite loop of board swaps.

[metaljo2003]

Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound

ok. so i unplugged the video input board and shorted pins 3 & 4 from the main logic board. with everything attached, the tv still clicks five times and shuts off.

[metaljo2003]

Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound

I will be testing this later on this afternoon and see what it shows. I replaced the board, but it's always possible that the one I received was bad.

[tom66]

Re: Samsung PN51D530A3FXZA Plasma Blank Screen W/Sound

Sounds like main board fault.
See:
https://www.badcaps.net/forum/showpo...61&postcount=2

[metaljo2003]

Ok, so my tv cut itself off about two weeks ago and started clicking immediately after. The video worked fine for approximately 2-3 minutes before this happened. I have a background in electronics, so I thought that I would figure this out on my own. HA. Well, I have replaced every board on the back of the tv except the video board. I cannot find any noticeable traces of a destroyed component. When all boards are connected, the relay clicks 5 times and shuts off. With the x-main disconnected to the y-main (they are daisy-chained) the tv powers up without video or backlight. However, the strange thing is that the voltage on the power supply VS is at 11 volts. It should be 207. The VP is at 0 volts. This voltage steadily drops to these from 207 (VS) and 58 (VP).

Now the crazy part, if I disconnect the ribbon cable from the main logic board to the y-main, then the power supply voltage and y-main voltages are correct. Should I connect the y-main and x-main with the ribbon cable unattached, then the tv still will not power on. I'm at a lost on what exactly could is wrong or where to go from here. Anybody else been through this or know where I should start?