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Re: pencil thin red line going down lefft hand side of...
Unfortunately, pixel thin lines are usually failures of the actual panel. If you can touch it and effect the problem, it depends on where. If it is in the middle of screen or away from the edge, you have broken connections on the TFT layer of the lcd panel.. meaning you need a new lcd panel. If you touch near the edge to effect, it is possible that the ribbon cable inside the lcd panel could be reseated to resolve. Opening the tv is one thing, but opening the lcd panel is another, its quite tricky and dust can get in between the layers. Only attempt if you have good disassembly skills and some compressed air to keep the dust out of there. The ribbon cables are very fragile and repairing by reseating is a hopeful but unlikely solution. A new lcd panel costs about as much as a new tv. Might just live with the issue or use as a tv for the kids.
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It sounds like you cracked the screen. If it is cracked, you cannot fix it. Your only options are to replace the screen (BIG $$$) or buy a new set. If you can email me a pic of the TV I can tell you for sure if the screen is cracked. LCD screen are very thin, about as thick as a dime and it doesn't take much to crack them.
try tapping your finger on edge of the screen where the line starts/ends... it works for me... its a lose connection normally with the rubber seals that have connections in them that lead to the circuit boards inside.... try it and let me know...
More than likely your control board. Available at www.partstore.com Cost could be between $130 and $200. Not that complicated to install if you can use a screwdriver and are careful. Let me know how this works out.
If the line is less then 2 inches wide this us a good indication of a bad PDP panel (Screen) usually very thin lines indicates a failure in the screen itselg, altho you might try replacing the upper and lower buffer boards to ensure its not the screen. You might want to take off the back and try reseating all connectors leading to the buffers and the Digital board. But in my experience thin lines less then 2 inches usually results in a bad PDP.
I'm not an expert, but I have determined that the vertical bars that are often red, sometimes blue ... and sometimes both ... are related to a bad control board. I've also read that a common fix is to buy a repair kit with includes the ysus, zsus and control boards ... all replaced together. My experience was that after a month or two with the 1.5" wide stripes, that you eventually loose the entire picture and have sound only. MIne comes back, but won't stay working for very long and the stripes are always there (buy used to fade and flicker sometimes). I'm planning on replacing the control board.
I had a similar problem with my LCD screen TV, and to my dismay, my warranty just ran out. A thin red line began to appear on the right side of the screen, and since many online and expert sources pretty much say replace the expensive LCD screen or get a professional to fix it (in which I suspect to be a business plot to get people to go to pricey experts), I decided to look for other possible alternatives.
Here is some tips/solutions I was given (and it worked! at least for me):
1) Turn off the LCD and unplug the power source and let it rest for 5-10 minutes. Turn it back on and see if it disappears or improve. (This is the one I used.)
2) While turned off, try jiggling gently all chords connected to the TV (cables, power chords, etc.); you could even try unplugging and replugging the chords/cables. Turn the TV back on and see if the red line disappeared or improve. (This is the one I heard worked for others.)
If the above doesn't work then I'm afraid you do have a bad panel on your screen and will need to call in the experts or get a new TV. I hope this will help. Best Wishes.