Question about Panasonic TX-42PT10 42" TV

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Screen discolour screen showing two reddish smears approx 5 inch diameter

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Re: screen discolour

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

Posted on Dec 13, 2006

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I have a Sony FD Trinitron 27' Model # KV-27FV310. It is approx 8 years old. After turning it on and watching a full screen for a few minutes; all of a sudden, a line came across half the screen;

top half missing is in vertical circuit of set---if it is a 27 inch and this old consider retiring it and replacing----other option is consider having a shop repair it--a rough guess would be as high as 150 dollars parts and labor is possible for your problems.

May 01, 2012 | Standard (CRT) Televisions

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My tv made a little noise and then the picture disappeared. The screen is black with a vertical line of picture approx 1/4 inch wide going up the middle of the screen. Is it fixable?

Generally this is not good news. Even in the event this TV is repaired, it will work very long. This TV has a horizontal problem. This is the most stressed area of any conventional TV. The Horizontal Output Transistor will need replace, the flyback transformer is bad, you have bad power supply with horizontal capacitors that are bad, and last, is a possible bad picture tube. This TV is not worth the effort or money to repair. Thanks for asking and show all hands of support!

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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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1 Answer

33 inch Panasonic gaoo bought in 95 picture trble

Check for leaky capacitors in the vertical section of the TV or cold solder joints.
I would also check in the power supply.
Good Luck.

Jan 16, 2008 | Standard (CRT) Televisions

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

Reddish screen on sony wega kv-28fx68 100hz trinitron

it sounds like a b+ cap going bad and is intermittant that feeds the the video drivers on the crt pcb or the crt is shorting.

Oct 14, 2007 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Toshiba 36A40 36" TV / Chassis No: TAC 0011

Bad capacitor in vertical circuit + possible vertical output IC
damage.If you can identify part locations and solder.....?

May 24, 2007 | Toshiba 36A40 36" TV

1 Answer

Picture smear and screen brighter on the right hand side

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.

Apr 05, 2007 | Sylvania SST4322 32" TV

1 Answer

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

Dec 13, 2006 | Panasonic TX-42PT10 42" TV

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