HELP Samsung PN58B860 image is dim grainy and there is a dark spot

Correction to the model number, Its a PN58B860 and not a PN64D8000. The box and TV model didnt match up.

Hello everyone,

I came a cross this this plasma on CL and figured why not take a shot of fixing it. Its samsung pn64d8000 PN58B860 it turns on but the image is really, really dim, grainy and there are a few dark spots. The spots are located near the middle\buttom of the screen and near the top right of the screen. When I play a movie; the dark spots at the top right go away. I don't think the screen is broken. Can you guys provide any input on what might be wrong with it or how I can start trouble shooting it? I am hoping that replacing a board or two can fix it.



Edited by str8maxn - 2/26/13 at 12:43pm

TOM669 Thank you for the info. I am a novice at best. From what I have read and seen the board your talking about is located at the top right of the panel. Please correct me if I am wrong. I am adding a left and right picture of the rear panel. I highlighted the board I think the X main board is. Can you please confirm?

LEFT SIDE


RIGHT SIDE



Thanks again.

JM

Thank you Tom.. I have ordered the board.

Tom,

I got the new board today... After replace it I still have the same issue. Any other suggests for you or anyone else?


Thanks Team.

Tom,

I got the new board today... After replace it; I still have the same issue. Any other suggests from you or anyone else?


Thanks Team.
Edited by str8maxn - 3/5/13 at 4:47pm

The sticker states Vs = 201 and Ve = 85, I do have an Multimeter but I am sure what setting to set it to.

Tom, I was able to figure out the Multimeter,

The sticker on the panel reads :

VS = 201 Tested @ 201 OK
Ve = 85 Can't locate on panel
Va = 55 Tested @ 54 <<<< Test lower by 1.
Vsc = -185 Can't locate on the board.

Also, I left the tv running for a few minutes and found that one heat sink on the Y board is hot to the touch an buzzing .


JM

I took picture from ebay for the X main board.
I highlighted the test points I did find.




Meanwhile I'll continue to look for the Ve.

If your talking about these they measured 104



VS was measured at that plug (the red highlighted box in the picture) there are two VS prongs both measured 201. I also confirmed the fuse was OK.

what about the Va testing lower?

Va = 55 Tested @ 54 <<<< Test lower by 1.

Here is a close up a the picture you sent. I dont see any testing points.

Tom, I took a closer look at that side of the board and found that that is indeed the Ve test point. I tested it and it read 84V ... 1 V less than what is should be.

Tom, I also found


Vsc = -185

The multimeter reads 150-165

when I first tested it , it was in the low 50's and when I retested I saw 150-165 .

Yes, I found the Vsc on the Y board.

Question: The sticker on the panel stated that the Vsc should be - 185. Does this mean negative 185 or below 185?

so replace the Y board?

First off, I second what Tomwil said. THANK YOU EVERY MUCH FOR THE HELP....

I did find 3 adjustment nobs on the Y board. Playing with them, I was able to get rid of the dark spot located at the buttom center. However this did not have any affect on the brightness, color or quality of the image.

First off, I second what Tomwil said. THANK YOU EVERY MUCH FOR THE HELP....

I did find 3 adjustment nobs on the Y board. Playing with them, I was able to get rid of the dark spot located at the buttom center. However this did not have any affect on the brightness, color or quality of the image.

Tom,

are you suggesting that the control board is bad vs. the Y board?

Tom,

Per your instrucitons,

Unplug the LVDS cable (see below) I am unclear what cable this is.
I am assuming that the pictures of the board removed from the panel are for easier viewing of the board vs. actually needing to remove it.


JM