Samsung PN50C550G1F black horizontal lines

[fhost]

Hello guys, first post.

I searched and didn't see this specific problem yet posted.

I have a samsung 50 inch plasma which has been gradually been developing black, 1 pixel thin, black horizontal lines. It started with 1 line and has, over the course of 9 months, grown to 100 or so. sometimes I'll even see one pop up before my eyes.

I've searched everywhere and have found others who have the same issue with samsung plasmas. Some forums suggested making sure that the ribbon cables were properly inserted into the y board. I've done this with no success. I've ordered a new y board for 30 bucks with hopes that this will solve the problem.

I wondered if anyone had any advice on the subject or had run into the same problem. did I waste money on this new board? The tv is less than 3 years old and I'll be so insanely pissed if I have to spend much more than a couple hundred to fix it.
Cheers,
fhost

[tom66]

Re: Samsung PN50C550G1F black horizontal lines

From top to bottom: Unrepairable panel fault. (Blame cost saving, unrepairable X buffer drivers.)

From left to right: Y buffer fault.

[Stevieo]

Re: Samsung PN50C550G1F black horizontal lines

Hi, I have the same problem, 7 fine lines. Is There anyway to repair it without replacing the board? Thanks Stevieo

[Mt.Man]

Re: Samsung PN50C550G1F black horizontal lines

If the y-drive board does not correct the problem, the panel is bad.

[electronicsurplus]

Re: Samsung PN50C550G1F black horizontal lines

I would try replacing the Upper Y-Buffer ASAP

Sometimes, one or more of the Surface moounted IC's fail and cause this problem before it fails completely

Because, the Y-Buffers not only light up the screen but, they also stream the data to the panel

IF this does not work you may have a bad panel

It might be worth the try by buying a Y-Buffer for approx $50-$75 anywhere.

Http://www.retechtv.com should have them in stock or Shopjimmy.com

Jon

Jon

[ppham]

Re: Samsung PN50C550G1F black horizontal lines

From top to bottom: Unrepairable panel fault. (Blame cost saving, unrepairable X buffer drivers.)

From left to right: Y buffer fault.

hi Tom66.
can u send me the manual for samsung 50 inch plasma seriel 5 model pn50c550G1FXZC
Thank you very much for your help my email.pivipi@hotmail.com

[freakaftr8]

Re: Samsung PN50C550G1F black horizontal lines

Hey guys bad news. At least on this one I have same model number. Y board replaced but lines are still there. It's panel failure but how? It's a direct ribbon right to the horizontal pixels. No tape carrier package.

[drpj23]

Re: Samsung PN50C550G1F black horizontal lines

I am at a misunderstanding too how horizontal lines could be panel...unless ribbons are damaged. If the lines are evenly displayed (or have a pattern) CTRL board is a possibility.

Vertical is 99% unrepairable......but there is a possibility of CTRL board or any bottom buffer boards. But most of time it is the driver ICs that are built within the panel that fail.

[freakaftr8]

Re: Samsung PN50C550G1F black horizontal lines

I am at a misunderstanding too how horizontal lines could be panel...unless ribbons are damaged. If the lines are evenly displayed (or have a pattern) CTRL board is a possibility.

Vertical is 99% unrepairable......but there is a possibility of CTRL board or any bottom buffer boards. But most of time it is the driver ICs that are built within the panel that fail.

Right you are, these panels are Samsung 1080p panels and for some reason what I have read on the internet that when one line fails, more are to come rather quickly. I dont get it. unless you have a blown out pixel on the beginning pixel from y ribbon, that is the only way for the rest of the line to go out as the pixels are in series. I have gone and disected a y ribbon connector on a panel doing this, and cannot find a failure within the connector or clip, this really has to be a breach underneath the glasswhere the ribbon fuses to the data lines.

[drpj23]

Re: Samsung PN50C550G1F black horizontal lines

The only way I see the panel itself fail is if the electrodes short out. I have seen this happen on a Panasonic but it always blows out the upper Y buffers (or corresponding thereof). It did look cool though when it tried to cut on....it was like red lightning.

Anyways, I am suspicious of CTRL board.
I have also read the Y sustain can be at fault but should be considered when horizontal blocks are out not really lines.

I guess I should also note, a lot of my information is from Panasonic PDP literature.

[freakaftr8]

Re: Samsung PN50C550G1F black horizontal lines

Yes but in my dealings with t sustain symptoms I'm not sure if it can Lose data to just one line. That's odd. Usually if the data is not fed you will have a grey screen unless the logic is suspected then it will kill off drive signals thus shutting down vscan and no picture.

[tom66]

Re: Samsung PN50C550G1F black horizontal lines

Y-sustain just lights up panel.

It can never cause individual lines to fail.

Only the buffer, digital board or panel can.

[ppham]

Re: Samsung PN50C550G1F black horizontal lines

which one should i replace first ?
y buffer/ or y main / panel???

[drpj23]

Re: Samsung PN50C550G1F black horizontal lines

If you have lines y buffers. Y SUS, as tom66 said, will not cause lines to fail.

Two, I wouldn't advise replacing the panel for they are very expensive unless you have a valuable resource somehow, in which case, clue me in

But Y buffers if you have horizontal lines. It'll be the upper or lower depending which half of the screen the problem exists at.

[ppham]

Re: Samsung PN50C550G1F black horizontal lines

i ask the sale tech .
he says . i should replace y buffer and y main as a set.
Notice. . Almost all plasma manufacturers highly recommend replacing the Y Main and Y buffer (or buffers) when replacing any one of the set. If a good Y-Main is connected to a faulty buffer, there is a high degree of likelihood that damage will occur to your new Y-Main, and the opposite often holds true if a bad main is connected to good buffers. Just a word of caution.
so in this case should i replace them as a set

[ppham]

Re: Samsung PN50C550G1F black horizontal lines

do any one in here fixed this problem succes? after replaced those board. The horizontal thin black line gone. pls let me know. I want to fix my tv with this problem . thanks for any advices

[ppham]

Re: Samsung PN50C550G1F black horizontal lines

Hello guys, first post.

I searched and didn't see this specific problem yet posted.

I have a samsung 50 inch plasma which has been gradually been developing black, 1 pixel thin, black horizontal lines. It started with 1 line and has, over the course of 9 months, grown to 100 or so. sometimes I'll even see one pop up before my eyes.

I've searched everywhere and have found others who have the same issue with samsung plasmas. Some forums suggested making sure that the ribbon cables were properly inserted into the y board. I've done this with no success. I've ordered a new y board for 30 bucks with hopes that this will solve the problem.

I wondered if anyone had any advice on the subject or had run into the same problem. did I waste money on this new board? The tv is less than 3 years old and I'll be so insanely pissed if I have to spend much more than a couple hundred to fix it.
Cheers,
fhost

hi
after u replaced the new y board. is the problem fixed? pls let me know my tv have same problem

[drpj23]

Re: Samsung PN50C550G1F black horizontal lines

i ask the sale tech .
he says . i should replace y buffer and y main as a set.
Notice. . Almost all plasma manufacturers highly recommend replacing the Y Main and Y buffer (or buffers) when replacing any one of the set. If a good Y-Main is connected to a faulty buffer, there is a high degree of likelihood that damage will occur to your new Y-Main, and the opposite often holds true if a bad main is connected to good buffers. Just a word of caution.
so in this case should i replace them as a set

This is only if you have no image i.e. the buffer ICs shorted out or something went bad on the SUS or furthermore, the set won't cut on because of Y section.

You have lines (as I still am assuming) therefore the Y SUS working properly due to the image you still have.

[tw2005]

Re: Samsung PN50C550G1F black horizontal lines

Just to add some more confusion the 50" panasonic TV I just fixed was Full HD and wow, how finicky those Y buffer ribbons were to seat absolutely correct so I did not have thin horizontal lines every where.

This was not the original fault but I had removed the buffers and the re-install introduced 100's of thin lines.

maybe post a picture and try reseating the connectors which match the lines.

I'd go with buffer issue first. I don't think panel or YSUS either.

[freakaftr8]

Re: Samsung PN50C550G1F black horizontal lines

True. Panasonics y ribbon attachments are finicky. So are hitachis. But these samsung a clip in. Yes the only way you can have one line out is either panel failure of some type or if one pin on the ic for the corresponding line is making a bad connection under the silicone n