Question about Panasonic TX-42PT10 42" TV

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Screen discolour one of the two reddish smears is moving around the screen,then after about an hour it"s gone. is this screen burn?

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Re: screen discolour

To determine it is a tube cover one at a time when the reddish dots are there. if they dissappear when one of the tubes is covered it is the tube but other wise U have a bad chip

Posted on Dec 15, 2006

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I left my tv on when I went to bed and the picture was fine. Then I woke up and turned it off. When I came home and turned it back on, the picture was blurry all around the tv except in the middle of the...

is the blurry all around the picture have different color like a smear of red, blue or yellow?
if it is i think the posistor of your tv is not working. it is the one who activate the degaussing coil around the picture tube the prevent color miss-landing upon opening your tv set.

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Emerson EWF2702 27" TV

I had the same problem it ended up being the speakers I had on top of my tv, so I had to move them. If you have anything on top of your tv with a signal move it. :)

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Tv discolouration

It sounds like your problem is magnetisation of the crt. Try to switch it on and off for 3 times: on for 1 minute, off for 3minutes, on for 2minutes and off for 5minutes. Then switch on and see if the discolouration dissappeares. IF not, then a technician needs to check the internal degauss circuits.

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TV Screen gets reddish in the right side bottom corner.

This sort of problem is normally due to the following.
Hifi speaker near the the tv set.
Magnet or something magnetic near the set .
Fault with the degause circuit.
Check around & move away anything that could be magnetic from near tv set, If you normally put tv to stand bye when not viewing Switch tv off completely at switch leave off for at least an hour over night is better, Then switch on this should now energise degause circuit providing the circuit is working it will clear the mark from the picture.
If you still have red mark you will require set to be looked at by shop.
Merry Chrismas.

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1 Answer

Colour stain


Yes it is A degause fault caused by either something magnetic being close to tv screen EG hifi speakers.
Or faulty degause thermistor, Or degause thermistor is not making good contact with pcb & only requires resoldering to pcb.
Allso try turning tv completely off at the mains switch leave a few hours then switch back on.
If you decide to take to A repair shop this repair is not expensive.


Nov 21, 2007 | Sony KV-27S10 27" TV

2 Answers

Screen has green and reddish spots in two upper corners

It sounds like the screen has become magnetized by the magnets in the speakers.

Inside all analog TVs is a device called a degaussing coil. When you turn on the TV for the first time (cold), the degaussing coil is energized for a couple seconds to demagnetize the screen and then it goes off.

You can purchase an external degaussing coil and demagnetize the screen youself. A degaussing coil looks like a small hula-hoop about 6-8 inches in diameter with a AC line cord attached. I've even made these coils out of long lengths of enameled wire, electrical tape and a line cord.

Once itas plugged into the wall outlet, you hold it close to the screen (1/2' away) with the hoop facing the screen and move the hoop in a circular pattern, covering all areas of the screen and slowly move the hoop away from the screen while still moving in a circular patten until your about 2-3 feet from the screen.

If you did it right, the color splotches will be gone.

It's possible that the coil in your set is bad. The coil is energized for a few seconds when you turn on your TV and then it shuts off a few seconds later. You can try turning on the set for around 30 seconds, and then turn it off. Wait about 10 minutes and turn on the set again. Doing this several times may let the sets internal coil (if its working) to demagnetize the screen. If not, you'll need to use a degaussing coil.

Let me know if I can be of further assistance to you.

Good Luck!

Oct 22, 2007 | Sanyo HT32744 32" TV

1 Answer

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If you know how to read a service manus then what you are looking for is a possible bad cap on the 200v source feeding the video output collectors or video output IC. That is the first suspect.

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sounds like a burn spot on one of the tubes open up to get access to the tubes and cover each one individually to determine which one and replace

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It seems you might have cold solder connections on the picture tube socket or on the picture tube drive board. If your not a tech please call someone to assist you with repair as you can be seriously hurt by the HI voltage insiode this set an or cauae more problems with the set. Good Luck

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