Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

[ironmountain]

Hi all!
Neighbor had this Samsung plasma in her bedroom and asked if I wanted it.
First plasma I've ever had/been given that wasn't new/working and since it's winter and I love a challenge, I figured I'd see what I could do with it.
BTW you guys/gals are awesome on this forum!!
So much help and no snide/rudeness that you find on some forums. Great place.

Model: HP-S4273
Model Code: HPS4273X/XAA
Type: CD42P7
PDP Module #: S42AX-YB02

Problem: See Pic. Vertical pixelated lines (wrong term probably) They all do move and it's as if the tv is scanning as you can see the vertical passes it makes.

The TV powers up just fine and stays on.
The sound works very well.
I can cycle through inputs on the back as well as the side just fine.
I attached my PS2 to both areas and all of the sound is there.
My Xbox360 was attached to the HDMI and same thing. Sound is fine.

When I hit the source button (tv or remote) it does flash to the blue no signal screen (as if you had just turned it on) for a moment. It goes to the blue screen (fully) and then I get this screen within seconds.

The menu doesn't show up either.

Thank you for any assistance you provide!

[Shinju]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Possible logic board or Mainboard failure. Please post photo of the entire back side of your plasma panel with the insides exposed so that someone can direct you better on what boards to test.

Thanks and Welcome!

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Thanks for the quick response Shinju!!
Sorry it took a bit. I got to spend 4hrs doing more backend fun for my website..

Hope these pics work.

[mmartell]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Have a look behind the main board, the control board is usually there. You want to put that in "test mode" to see if you get proper test patterns or not. That will indicate which board has bad processing.

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Thanks! I just need basic stuff for that, correct?
a HD jumper, soldering iron, some resistors and the remote and just follow the tutorial on the forums?
I'll do that in the a.m. and let you know what happens.

thanks again guys for the fast response.

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Good morning.
I disconnected the LVDS cable and put a jumper over pins 3&4 on the 4 pin block.
Turned on and screen was black with random color pixel flashing. Had to darken the room (of course) and really concentrate to catch them.
It's a mix of white/green/blue/red pixels. One pixel at a time.
Only occurs in the middle third of the screen.
I'd say 2-3" on either side of the Samsung logo and power button.
Goes from bottom to top.

Same thing with sound and inputs.
PS2, Xbox360,back of the tv and side input panel.
The light is green on the board that has the side inputs on it.

Hope that gives enough info..

Thanks again for any help!

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

With the symptoms above, is that board dead, or do i need to rotate through boards to check? Would a fuse cause this or is it a larger prob?

Thanks in advance for the help! Wife is pushing me to "fix it or get it out of the house".
Which means I'd just do a teardown and part it out (not the boards) and keep the pcb and caps for my tub full of parts.

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

couldn't edit it, so had ot make another post.

The fan on the mainboard kicks on when you power the tv on but stops a few seconds later.

[mmartell]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Are you sure that you are jumpering the correct pins ? Try 1-2 or even 1-3 or 2-4 if that doesn't work. I have a Sammie here that has a 6-pin jumper block and needs 5-6 jumpered for test patterns.

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

I took an HD jumper from a working HD and the pins are numbered on the board.

the jumper must have been junk...I just put another one on and i'm getting the color and b/w test patterns now. l should have done that in the first place. Being in the IT industry for years, should have known.

[Shinju]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

So are the patterns good or are they tainted with lines too?

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

it's all nice and clear like it should be. the blue/red/green solid are bright. The black to grey gradient/swiping test (vertical/horizontal/corner to corner) is smooth.

Main board or LSDV cable?

It's nice to see solid colors for now.

[tom66]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Most likely (99%) main board.
1% chance it's still the control board. If patterns were bad when you tested it, it would have been 100% control board.

[ironmountain]

Re: Samsung HP-S4273X/XAA Vertical Pixelation/Lines?

Thanks Tom!
should I just replace the board or dig deeper as far as inputs/tuner etc..?