HPN 5039 Samsung Plasma. Dark picture with pink snowy fuzz. Pics included

[Zedsdead]

Hey guys so I have a 50" plasma (samsung hpn 5039).

It's been giving me hell for the last month or so. It turns on fine. Has no problem staying on but the picture is horrible.

It's dark, fuzzy/grainy and has what appears to be pink snow that takes up most of the top left portion of the screen.

I've replaced some of the caps that were bad but that didn't seem to change anything. I suspect that there are more bad caps so I plan to head to local parts store and grab some. I will include pictures.

Found voltage sticker. tested all voltages. They are as follows

V5d: sticker rated-5.3 actual- 5.3
VG: Sticker-15- actual - 15.3
VSCAN: Sticker-95 Actual- 110
VS: Sticker-82 Actual- 101
VSET: Sticker-125 Actual 144
VE: Sticker- 115 Actual 129
VA: sticker-76 Actual 87

Seems that they're all high.

I've noticed a few of the largest caps on the PS are bulged. But not bulged in the middle. They are bulged on all four sides of the x. The dead center of the caps is still fine. Not sure if that helps @ all.





If you need more pics or more info please feel free to ask


http://postimg.org/image/cdqhju793/

http://postimg.org/image/6fh9ncdo7/

[tom66]

Re: HPN 5039 Samsung Plasma. Dark picture with pink snowy fuzz. Pics included

X-main fault.
I'd suggest replacing your multimeter battery.
Also, Vs should not be 110V, it should be closer to 200V.

[Zedsdead]

Re: HPN 5039 Samsung Plasma. Dark picture with pink snowy fuzz. Pics included

Thanks for the info.

What makes you think it's an X main fault? Also why do you suggest I replace multimeter battery? It's fairly new. Just curious. Thanks

[tom66]

Re: HPN 5039 Samsung Plasma. Dark picture with pink snowy fuzz. Pics included

A low multimeter battery can cause universally high readings, which you are seeing. Even leaving the multimeter on for just a day can drain the battery, and the low battery indicator doesn't always work.

The display is showing poor diffusion, a characteristic of X-main failure. If you had no picture at all it might be a Y-main or X-main fault (then isolate X-main power: no picture: Y-main, picture distorted: X-main.)

[Zedsdead]

Re: HPN 5039 Samsung Plasma. Dark picture with pink snowy fuzz. Pics included

I gotcha thanks for the tips on the DMM.

So now sadly the question becomes which board is the X main? Will post pics.

I've been told that the X is the one on the far middle right side of the picture.

But when I unplug this board from the PS it still has the pink snowy image.

Thanks

[tom66]

Re: HPN 5039 Samsung Plasma. Dark picture with pink snowy fuzz. Pics included

Yes, the rightmost large board is the X-main.

It supplies drive waveforms to the common electrode. If the waveforms are missing or poor, the distortion you see is shown. Naturally unplugging it will show the same effect too.