Samsung TV Lines on Screen

HarryDog

Hi all experts,
I have a 32" Samsung LCD T.V. LE32R73BD. It is 4 to 5 years old Can't remember. All of a sudden the picture went and there were only coloured vertical lines across the screen. I had to turn it off and turn it on it worked for a minute and then the lines were back. I have a 3 year old who likes to plug it out when its on and this probably did it. Is there a part that normally fails on these that I can replace. I paid a lot for it back in the day and don't want to bin it. Any help would be greatly appreciated..

tmcw

Pictures would help. Do the lines go all the way from edge to edge?

Could either be physical damage (are the lines visible in the moment between switching AV inputs?) or deteriorating connection between the timing control board (Tcon) and the LCD panel (usually a flexible circuit "board" connector bonded and/or taped to a regular circuit board). Physical damage would require a new LCD panel. Bad connections can be (temporarily perhaps) repaired by stuffing something in the gap to improve the connection.

To be honest, 5 years for an LCD panel seems to be pretty good, TVs aren't made to last like they used to. I wouldn't blame the 3 year old, power cycling like that might degrade the power board, but not the connections.

HarryDog

Thanks for reply TMCW. When it happens wide coloured vertical lines are across the screen from left to right. The remote control and tv buttons will not do anything and I have to just power it down.I tried it yesterday having left it for a couple of weeks and it comes on fine and worked for half an hour. The problem did not reoccur. I suppose something could be loose. I just need to know where to look.

tmcw

Ok, so some of the time the picture is fine?

Does it look like this when it flips out:



I got that picture from here, there's a large thread on that model on avforums, might be worth having a look.

HarryDog

No. It gives dead clear straight vertical lines about 3" across each. Almost like a test card. I'll try and get it to reoccur so I can get a pic. I'll probably open it up out of curiousity to check for loose cards etc,

sonyproblem

Hi, I found this thread from a Google search. I was about to junk my TV when I thought I'd get a second opinion. I talked to a local TV repairman who I absolutely trust, but I just can't stomach throwing away this TV that I only used for 2-3 months without exhausting every possible option.

I bought this TV Dec 31, 2010 and a month or two later, my daughter got some spray onto the screen, and it got down onto one of the boards. There are two of these boards, one on the left, and one on the right. They connect the TCon to the Panel. On the TCon side, the connection looks serviceable, but on the panel side of the connection, it does not appear to be serviceable.

About 40-45% of the screen is not working (blank with two ed lines and a white bar), and the rest of the screen works fine. I opened the TV and saw corrosion between the board on the left-hand side (as viewed from the front) and the galvanized metal frame. I removed the screws to the metal frame and swung it out of the way. I cleaned the board and connection with electronics cleaner/degreaser and a toothbrush. I did not disturb the foil "tamper-evident" sealing.

I took a picture of the board that I thought could possibly be replaced. Unfortunately, I took a picture of the bare board part number, and not the entire board assembly number, which I was told would be on a white sticker affixed to the board. I wanted to see if this board could be replaced. The repairman said that even if I had the correct part number, the connections to the panel are factory connections that he could not do in his shop; therefore even if I could get the board, he could not replace it.

I am not a repairman, but I'm somewhat handy and intuitive about these things, so it seems to me that this board would be the problem and that the panel and the board supplying the signal to it are probably fine. The repairman seemed to agree this was the most likely scenario.

Any thoughts on what to do? If the connection from this board to the panel is not serviceable, can I replace components on the board (i.e., capacitors or other)? I checked with Sony out of curiosity to see how much they would charge for a panel, but they said they don't stock these. Also, I checked the TV parts web page (forget the name) and called them, and they said they don't have one either. Even if they did, it sounds like it's generally cheaper just to buy a new TV.

tmcw

I'd say your panel is fine, but the board looks like a basket case. The photo isn't great, but it looks like there is corrosion around the components, and some of the traces look corroded too. I sometimes repair monitors, but wouldn't bother with anything that looked like it needed SMC's replacing.

If you could get a replacement board, it might be possible to swap them, but it's very difficult work, and probably won't last long. Sometimes it's possible to repair something like the 2 red lines, by stuffing something into the gap, to force the flexible connection to the board, but even then, it's hit and miss.

At best, you'd be lucky to get a panel with the boards already attached, most likely, you'd have to get the light box as well, probably not cheap. You might be lucky and find one on eBay, taken from a set that had a different fault, but you'd be taking a chance. New part from the manufacturer probably cost close to new price for TV.

HarryDog

Their not my pics, but cheers for all advice. This tv has been sprayed with cleaner and loads of crap due to kids crayons, chalk and scrambled eggs. Any terminals, plugs etc at the bottom of the screen would definitely be the place to look.