My flatscreen TV will startup with a purple/magenta screen. The picture is all there. In as little time as 1 hour, as long as a full 24 hrs, it will then go to a green tint over the whole screen. The fleshtones won't be true, they will have a slight red/orange tint to them. I can get blues, etc., but the whole screen stays with the green tint. It doesn't adjust out & it doesn't matter what input or type of device is plugged into those inputs. Solution(s)?
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Re: Toshiba 32AF41 Power up Problem and Green Screen
My first inclination would be to check the picture tube, especially if the set is over 7 years old. If it is not that, then anything from bad solder connections to capacitors or a defective IC could be the cause. If it's over 10 years old, replace it. No use flogging a dead horse.
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Purple Panasonic PC>TV Problem:
The VGA cable uses three primary color RGB channels.
Red, Green, and Blue.
The picture is made up of pixels or dots arranged in a grid along the "X" horizontal axis and "Y" vertical axis.
The computer mixes the intensity of each color channel to create a unique color per pixel.
All RGB at 100% creates white.
R+G creates yellow.
R+B creates magenta, ie purplish.
G+B creates cyan.
So a purplish tint sounds as if your Green wire has no signal, which may indicate a faulty VGA cable or VGA socket.
Put another way, (R+G+B)-G=R+B=magenta.
So try another VGA cable, spray all socket pins with "Servisol " or similar contact cleaner.
All 0%=Black; All 50%=Grey; All 100%=White.
These are caused by the ageing of the tube and the final video transistor for the green cathode - the cutout voltage on the final video board is no longer doing its job as the tube heats up so the current passing thru the tube goes up until the X-Ray protection kicks in and cuts the power completely. Resolder all the components on the video board and try to readjust the cutout voltage - there's a semiadjustable resistor on the video board, right next to the video power transistor - this will give you a few more months of use.