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Re: It was working fine then no picture dark sceen sound...
More information is required. Your backlight is lit (screen not dark) but I need to know what you have connected to the TV (your sources) and how they are connected. Does the menu/OSD (on screen display) work?
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If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent.
My 3-year old 52-inch Toshiba flat panel TV (Model # 52RV53U, Serial # AM409000295) developed a display problem (purchased Aug. 2008, manufactured July 2008). Vertical multicolored lines appeared on the screen just left of center. The band of thin vertical bars is 5.5 inches wide. The lines are about 1/16-inch wide. They are stationary, always exactly in same place. They over-ride any other picture on the screen (no transparency). They are there all time even with no video inputs to the TV after the unit is turned on. See picture #1. The TV works well in every other respect, but, obviously, it is annoying to watch the picture with the color band blocking about 1/6 of the picture.
Further info, pics, comments, and updates on my Facebook page at
I already swapped out the TCON board with no improvement and replugged the TCON board cables with no improvement.
Most likely it is the flat panel tab bond failure (panel made by Samsung). Further solution updates will be on my Facebook page.
hi i have a 50" magnavox that has a problem, i was looking at several websites and i find out the dirfferent posibilities.
in your case i have 2 posibble answers.
1) negative image tv turns on and shots down in 2sec flashing pixels on screen dark image has sound but no video screen goes black and then return to normal picture vertical color lines on screen no video vertical color lines with video vertical bars on screen horizontal lines on the image picture goes red after while
IT COLUD BE (X or Y or Z SUSTAIN BOARDS )
2) just left part of screen working just right part of the screen is working vertical and horizontal lines on screen part of screen not working some functions not working no video but has sound functions not working at all
IT COULD BE (LOGIC CONTROL BOARD)
One of your "X" buffer boards is defective. In Panasonic plasma tv's they are located at the bootom of the set and connect directly to the plasma diplay panel via a thin ribbon cable. The board you want to replace will be directly in line with the discolored vertival line in the picture. The part number is on the circuit board and usualy starts with "tnp..." or "txp..."
I just tried re-setting the digital tuner, which for the JVC LT-37x688 is as simple as powering the TV on, and holding the chanel down and volume down buttons simultaneously for about 3-5 seconds. The screen will go to black, and the TV will power off. Turn it back on, and you get the JVC logo again as everything re-sets. This solved my problem with vertical colored bar lines vice a picture, and sound.
If under warranty then of course use that. This is a display problem. One solution someone knowledgeable in electronics can try. This problem can be caused by a bad connection fitting of the flat cables on LCD controller board. Dis-connect the flat cables from the LCD controller(T-CON) and carefully reconnect them. Try the unit before reassembling the back cover. You may have to disconnect/reconnect several times to show improvements if this is the problem.
I had the same problem I was told to unplug then reset but still no luck. Mine have been broken since Aug 2006 and seems like it's so hard to find somebody to fix it. Please let me know if you fix yours.