Question about Sony FD Trinitron WEGA KV-36FS120 36" TV

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Color in picture only good in 4 corners

The picture tube on my T.V. has been getting 'waves' of color flashing across it periodically for the last few months. Over the last couple of days we have noticed that there seems to be a large cross pattern of bad color for the bulk of the T.V. screen, and the color only seems good for about 3" rectangular sections on all of the corners. This phenomenon is perfectly symetrical. Any ideas would be greatly appreciated!

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Re: Color in picture only good in 4 corners

I think it is a magenatic effect called degaussing problem. please remove anything very near to it which has got magnet like speaker headphone etc. call tech to gegauss it. it is hardly 5 minutes job. please do not change the angle while watching tv. your tv seems to be 100% ok. good luck.

Posted on Oct 05, 2007

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2 Answers

Color halo's on screen

On old style CRT TV's there used to be a Degaus button that nuetralized any static build up inside the tube, and corrected those "Halo" or Color ghosts on the screen. You can take a very strong magnet and pass it a few inches in front of the screen. Try sweeping the magnet across from left to right until you have accurate colors again. (Takes less than 1 minute)

I have a CR202 EM8 and I have had to do this a couple times over the years. On my cable system I can tune in a Color Bars pattern on channel 2, which makes it really obvious where the static build up it affecting your colors.

Good luck...

Jul 31, 2010 | Emerson CR202EM9 TV

1 Answer

Bleed through of color

the problem is the discoloration of the picture this happens due to magnet effect..or a magnet probably speakers set of a sound system place near your tv..2nd is the built in demagnetizer of your tv is malfunctioning...the built in demagnetizer is place at the back of the pictire tube it is wrap with an electrical tape and place around the picture is activated everytime the tv is power on...the demagnitizer is controlled by a thermistor is a device which is activated by a certain temperature,once it reach the max switch off..check whether it is soldered proerly on the pcb..use a soldering iron to fix can also buy a demagnitizer from an electronic shops to demagnitized the picture tube..simply plug in the demagnitizer to an AC outlet and with the TV powers on bring the demagnitizer in front of the tv in front ot the monitor press the switch on button and move the demagnitizer in circle and sideways until color is ok..caution do not power the demagnitizer for a long time this produces hit rapiddly.

good luck hope this helps you..

please rate my help tnx.

May 29, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

After the tv has been off for only a few minutes and you turn it back on the picture will flash on and off for 5-10 minutes and eventualy it stays on and works fine till you turn it off again.

Hmm, you have 2 possibilities that I can think of. First, if the picture color and brightness seem relatively normal, I would replace the CRT driver on the C board. This is attached to the back of the CRT via the pin socket. Second, if you notice a darker picture or faded color during the cycling period... things are not as rosy. This is a good indicator of a High GR (gas ratio) condition. Basically, your CRT is leaking.

Mar 14, 2010 | Sony KV-32FS12 32" TV

2 Answers

Sony Trinitron screen flashing

The picture tube is starting to fail. The increased screen voltage allows it to stabilize at the expense of color quality. Sorry to say, but it is time for a replacement.


Dec 17, 2009 | Sony Standard (CRT) Televisions

1 Answer

Intermitant color bursts of red, green, purple


for the color problem,most likely you do have problem with loose contact of components from C-board ( small board connected at the back of CRT "picture tube" which drives every color and size of the screen)if you have knowledge with soldering electronic component parts, resolder this board and also check main board for possible loose contact.


Feb 04, 2009 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

TV picture won't open.

The vertical sync circuit has gone'll have to have it repaired if you want to keep it

Jan 03, 2009 | Standard (CRT) Televisions

1 Answer


Classic bad picture tube! End of natural life for that make/Model.

The  current sensing circuit is turning the video on/off.

The orangey look also indicates CRT no good.......T.

Oct 20, 2007 | Standard (CRT) Televisions

1 Answer

Bad picture color. red LED blinks 5 times. Replace picture tube?

Definitely bad picture tube==not worth fixing......T.

Oct 11, 2007 | Sony KV-36FS16 36" TV

1 Answer

Please Help

Is the red light flashing a code ? exaple 4 blinks pause 4 blinks ?

Apr 07, 2007 | Sony KV-27FV16 TV

4 Answers

Screen green and purple in two corners

I am in agreement with the second solution. TVs, when moved from one location to another have a tendency to show color patches in the corners. A few days of usage, and the auto degaussing circuits will clear the problem. Also make sure that there are no Magnet Sources nearby (Un sheilded Speakers, some Power supply of amplifiers, A 2-in-1 music system, your kids walky-talky toy, etc.) Pravin

May 26, 2006 | Samsung TXN3245FP 32" TV

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