For the last couple of days, I have been observing different coloured circular patches on different positions of the screen of my SONY make TV. Two of them are observed as violet, one as green & the other as red while the background is white.
Kindly provide information about probable causes for such problems & the remedy.
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Re: Problem in Screen display
Hi, J !
You didn't say how old you set is, but to me it sounds like you may have a warped shadow mask in you picture tube.
A shadow mask could be compared to a piece of screen wire. It's function is to make the electron "beams" from the three electron guns strike the proper phosphor dot to produce the proper color- red-green-or blue.
If this is the case the picture tube would requie replacement.
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Dont use a damp cloth. Use an air hose or can air if possible. The color differences may be your color wheel and not your air filter. You may have to reset the projector to clear the alerts, just hold both volume buttons for 5 seconds. I've found its usually 30 seconds Hope it helps, good luck
The colored line you saw was the actual screen pressing against the back of the psp......Example would be if you put your thumb and pressed on a laptop's screen. It doesnt work now because the screen is now cracked and you can either order a replacment screen on amazon for about 50 bucks or buy a new system
When power ON, ther is only a colour patch appears on the middle of the screen . I observed some resistors and three transistors in horizontal sections were burnt.
I cannot read the real values of them because they are burnt.
Please kindly can you tell me those real values in that section.