Screen has green corner at first and may changeto pinks and green

unplug your TV look on the back for a three controls marked red / blue / green "screen" turn / tap on them; watch the screen when you find the "dirty" control clean it with "TV tuner cleaner spray"

If you have a LCD-screen, not an old-style CRT-screen, it is the data-cable, and its connections, that are not transmitting one of the 3 "primary" colours, e.g., mix red & blue & green to get white,
but mix only two of those colours, and you could get pink,
because the mixing is an "additive" process.

If you mix NONE of the 3 primary colours, you should get BLACK.
If you see GREEN, you're seeing ONE of the primary colours.

Loose electrical connection or its loosing its grip to hold your screen. If you can do it on warranty then try. Or have it check by a technician.

hello.... do you have any speakers near your television? what color is the circle your talking about? Do the green,pink colors are scattered all over the screen and specially on the corners?
If you have or had speakers near your tv? then do this try to get a magnet.a magnet on a speaker would do.what you have to do is to place the magnet near the screen of the tv approx. above the green,pink color (turn it on first).you will notice the that the color will react with the magnet try to pull it on the side you will notice that the green,pink color is moving on the same direction do it until its gone.NOTE make sure youll not scratch the screen ok.email me what happened. jaredreyesbalderama@yahoo.com GOODLUCK

since dlps use a color wheel to make the color the color wheel may be going out. get it serviced

Try turning down (off) the color during such an episode. If the image is tinted pink or green instead of black and white when you do this,you have either an intermittent short in your CRT (tube), which is terminal,or a gun drive problem, which may be repairable. If you're feeding it component instead of composite signal,it may just be a bad connection of the B-Y cable.

This sounds like your convergence correction amplifiers have malfunctioned. These Integrated Circuits often burn out after a few years (STK392-110) they can be replaced with a higher version (STK392-150) However it is important to have the biasing circuitry checked to make sure nothing has burnt out as a result of the ICs malfunctioning. If you have a background in electronics you can repair this problem with very little effort, however if you do not have a background in electronics, I would suggest that you have your TV serviced by a qualified TV technician.

 

I hope this helps,

 

Thank you,

 

Shuttle83

Here is what I was able to find out about your problem from sony: This issue is usually caused by some type of nearby magnetic interference, such as unshielded stereo speakers placed too close to the TV. These spots can be small or large and will normally be red, green or blue, but sometimes appear purple or pink. They normally occur on the sides or corners of the screen, but can also appear in the middle. To resolve this issue, move any stereo speakers or other electronic devices away from the TV; a minimum of 2-3 feet is recommended. If the situation is not remedied immediately, unplug the power cord of the TV from the electrical outlet for 20-30 minutes; repeat this process one more time if the issue is not resolved the first time. If the issue is still unresolved, service may be required. The Sony® eService Web site at http://eservice.sony.com/ can assist you in obtaining service from a Sony Service Center or locating a Sony Authorized Servicer in your area. Hope this is helpful:)

you can get it your tv fix the problem is in the IF amp and video circuit.a convergence will also be neeeded.the tv is old but can give you some more life call a tech they will be your tv doc.

Getting the squematic will be the first step to take to become more familiar with the electronics inside,you can ordered by going to http://www.servicemanuals.net/ click on service manuals and give them the model number,they will then give a price and availabilty.The color processing uses a driver for each color and an output for each color too,the output are ussually placed in the crt board in theneck of the tube.the drivers and outputs are transistors most of the time but sometime the drivers are part of an integrated circuit.Please let US know if you need more help but place it as a new question.