Samsung LN55C630 LCD with horizontal black lines

[jlathe]

When I turned on my Samsung LN55C630(K1F) LCD this morning, there were a bunch of thin black lines running the width of the screen, horizontally. All lines are about 1mm thick with equal spacing between all lines. Issue is found all on inputs, also on menu screen.

I had been having some issues with colored lines running vertically, but I found that a light tap on the back by the T-con board would fix the issue.

I checked the capacitors, which seem to be fine. I tried re-seating the T-con board's cable, nothing. I have not yet torn the TV down completely to check the LCD tabs, but in pushing on the bottom portion of the screen, that didn't seem to do anything.

I've been reading around and seeing some people replacing the actual T-con board and having some success, didn't know if anyone else had this specific model and had success fixing the problem.

Thanks

[tom66]

Re: Samsung LN55C630 LCD with horizontal black lines

It does look like it could be a t-con problem. One thing to check. If you bring up a fully white screen, are the black lines invisible or visible?

[jlathe]

Re: Samsung LN55C630 LCD with horizontal black lines

It does look like it could be a t-con problem. One thing to check. If you bring up a fully white screen, are the black lines invisible or visible?

Just tested some plasma break in slides. On a bright white screen, almost washout white, the lines do not appear. But when I take it down a slide to a duller white/gray, the lines appear. The lines then appear on all subsequent slides/colors

Thanks

[tom66]

Re: Samsung LN55C630 LCD with horizontal black lines

OK, so what this means is it can't over-drive the pixels, which means it's likely a t-con or main problem and not a panel issue, unfortunately I don't know how to rule out the main board.

[jlathe]

Re: Samsung LN55C630 LCD with horizontal black lines

OK, so what this means is it can't over-drive the pixels, which means it's likely a t-con or main problem and not a panel issue, unfortunately I don't know how to rule out the main board.

Awesome. Good to hear it's not the panel. I'll pick up a new T-con board and test that, and then move onto the main board if need be.

With the T-con board, I've seen a couple different iterations for the LN55C630, just a letter off. Do I have to get the exact same board, or can I substitute another one?

Thanks for your help.

[tom66]

Re: Samsung LN55C630 LCD with horizontal black lines

If the board looks roughly the same, it should work -- obviously, don't order a board that's completely different. There's usually a part # at the top or middle of the board, have you tried using that to order?

[jlathe]

Re: Samsung LN55C630 LCD with horizontal black lines

If the board looks roughly the same, it should work -- obviously, don't order a board that's completely different. There's usually a part # at the top or middle of the board, have you tried using that to order?

I'll have to pull the back off the tv again to get the exact number, but I will use that when I look around online.

[jlathe]

Re: Samsung LN55C630 LCD with horizontal black lines

If the board looks roughly the same, it should work -- obviously, don't order a board that's completely different. There's usually a part # at the top or middle of the board, have you tried using that to order?

Just wanted to give an update on this problem. I ordered the T-Con board, and as of right now, fingers crossed, knock wood, the problem appears to be resolved.

Thank you so much for your help with this. I really appreciate it!