Samsung PN43D440A5DXZA Black Screen Clicking

[Mathias25]

Hello all!

I just took a chance and picked up a Samsung plasma TV for $25 to try and fix. Here is a summary of what I know so far:

1)Plugging in the TV a here a few clicks of what I assume is a relay, but the TV does not power on.

VS = 0V
Va = 0V
VSC = 0V

2) Disconnecting the X board from the Y board allows the TV to go to standby mode with a red light in the front. When I press the power button the set powers on with the usual power on tune.

VS = 200V and slowly bleeds off to 0V
Va = 57V and slowly bleeds off to 0V
VSC = -185V and slowly bleeds of to 0V

3) Disconnecting the X and Y boards at the same time has the same results as the step above.

4) Disconnecting only the Y buffer has no effect and the TV does the same clicking and will not power on.

At this point I am thinking that the X main is bad, but I would like some advice before I invest any more money into this thing. Is there a way to make sure the panel is not bad before I spend any more time on this thing?

Here are some photos. The X Main board is missing because I removed it earlier and didn't want to stick it back in just for a picture. Let me know if there are any more pictures you would like to see.


Thanks in advance!
Matt








https://onedrive.live.com/redir?resi...4C2F426%211213

[Mathias25]

Re: Samsung PN43D440A5DXZA Black Screen Clicking

Anyone? I can provide any other information needed.

[Evenflow]

Re: Samsung PN43D440A5DXZA Black Screen Clicking

Im a total noob...but had similar problem with an Insignia plasma (every board in it was a Samsung so may apply) If you disconnect X-main and have sound where there was no sound before, replace the X-main.This is what I understand from reading posts here. I've ordered mine.Ill let you know if it works......And then again I could be totally wrong. Hope not

[Evenflow]

Re: Samsung PN43D440A5DXZA Black Screen Clicking

From your photos it looks very similar. The one thing that stinks about these setups is the x and y are chained and you cant unplug just the y without killing the power to x also.

[tom66]

Re: Samsung PN43D440A5DXZA Black Screen Clicking

On these X-main failure is very common and there is a repair kit available consisting of a few surface mount parts.

[Evenflow]

Re: Samsung PN43D440A5DXZA Black Screen Clicking

Thanks Tom66. There is a small x-buff, a couple small capacitors and 2 ribbons to panel. Do they also go bad? Having hard time finding part # fot that small extension board

[tom66]

Re: Samsung PN43D440A5DXZA Black Screen Clicking

No, they are usually absolutely fine.