I have a JVC 37-Inch flat panel TV, and recently a horizontal field comprising about 1/4 of the screen is malfunctioning, with black lines and distortion. Sometimes the distortion is there immediately upon turning the set on, and other times it develops shortly after. What can I do?

SOURCE: Thin black horizontal lines on JVC PD-42WV74 EDTV

horizontal line is an idication of a bad board known as a x driver board. Their may be a slight possiblitliy it can be a small ribbion cable that runs from the driver board to the plasma panel. Another possiblility it can be a bad panel... but from the symptoms you describe i would first have to look at that driver board. and the sympton that getting worse makes me lean toward a bad ribbion cable.. if that could be reseated....well that the first thing as a technician i would try. Carefull Television generate dangerous voltages.

SOURCE: Vertical Black Line

try wash out feture on samsung for 30 sec white out see what happends also upgrade your firmware for these via thumb drive ok

SOURCE: JVC HDTV Pictrure Distortion

Your TV needs to be calibrated. Rear projection TVs are very sensitive to movement. They have 3 color canons that need to be precisely aligned so that the colors overlay each other. They are like three projectors all aimed at the same screen.

If you were to enter the User Menu on the TV, you should find an alignment/calibration choice that will re-align the colors using some on-screen help.

If you are not able to resolve the situation on your own, a certified ISF Calibrationist should be called.

And, since you've bought this TV used, it should be cleaned by a professional (the canons, lenses, etc.)

SOURCE: jvc lcd tv model lt40x776

LCD monitors are divided up into smaller strips. Each strip has it's own video driver. That strip has either lost it's power source, or the board is bad. Might just be a loose solder joint, if you are lucky.

SOURCE: JVC PD-42DX6BJ plasma 42 inch black horizontal lines over the pic

Here's a link to order the original the JVC upper Y-buffer board and lower Y-buffer board for this model from a major parts distributor if needed:


JVC "PD-42DX6" Replacement Part Upper Y - Buffer Board (LJ41-02760A)

JVC "PD-42DX6" Replacement Part Lower Y - Buffer Board (LJ41-02761A)

Based on the symptoms: It is possible that the Y-buffers are faulty, which may require the replacement of the Y-sus board as well. You may want to get a local technician to diagnose the unit and provide a second opinion.