Recently I have noticed a blue shade on the upper left corner of my plasma screen; it always appears when a certain degree of white color displayed on the screen.
My plasma is 2 months old. I have tried all white and signal pattern options but nothing happened.
When I resize the screen to be 4:3, the displayed image shrink and the image become perfect cause its far away from the edge.
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Liquid Crystal Display - LCD There is a Flo recent light that shines behind the screen. This light is what passes through the window or LCD when the shades are open or partly opened. Think of each colored individual LCD (pixel) as a Window Shade. You have pixels that are made up of 1-red, 1- green and 1-blue light shade. Your main control board will tell each light shade how much/far to open each colored light shade so it will make the color it needs to. If the shades are closed (black) if the shades are all open (white) Hope this helps.
First you must clean connector contacts between plasma module and driver boards, if not solve the problem and continuing increment of wide red line, may be you must change plasma module to solve this problem,
Check all of your cables on the back of the tv and your sources such as Cable,Sat box and DVD palyer to make sure they are fully inserted into the input and output connectors. Some times Component cables will work loose and you end up with a missing color. Temprature changes can affect intermittant connections. If that does work then you have a bad Main bd.
There may be a failure starting on the video or matrix driver boards. This has to be verified at the service center. The fix will be done by swapping in a new board to replace the failing one(s), and re-doing the factory setups to make sure that the default colour temperature and levels are correct.
I suggest that if the set is out of warranty ask for an estimate first.
Try to replace the Logic Scan board on the upper left side of your tv. The part no. is printed on the board and you can order it from Panasonic's Website. Also check the Service Manual for the part description and part no.
some of these panels were mis-calibrated from the factory after not aging long enough. Let the TV run for atleast 2 hours and adjust the Vs and Vscan voltages. When it is blue in the left I have found generally the Vs is about 10 volts too high.