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Hello; You probably have a CRT type set. Something has magnetized your CRT/Picture tube. The set has a built in degaussing system that will only work when you turn on the set when it is COLD ONLY. If after several cycles of turning on the COLD set and the green color hasn't gone, the circuit in the set for doing this has failed, OR you have the set near strong magnets, such as speakers. PUT ALL speakers at least 4 feet from the set and go through these off on COLD cycles. The deflection yoke on the picture tube could have moved due to Sony using crappy adhesives to hold the yoke positioning wedges in place. I am so glad to be done with Sony!!!!! John
Sony TVs has an Optical Block issue. If there is an issue with the optical block, then there will be green, blue patches or tint on the TV display. Try resetting the TV to the factory settings and try Power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue still persists, then TV may require service. You can contact the Customer relations team and check for the available options. Sony had repaired free of cost for such issues. Hence, contact the customer relations.
the picture tube is gone.
i repaired 150 sony xbr and kv series with that problem.sony has a single gun not three and has a great pix,but burn out faster.
there is a main screen control that you can adjust ,but the tube is gone.
on the back of the crt there is 3 gun drives r g b .
turn the color all the way down so it is black and white.
if there is a green ore purple tint,one gun is out of balance.
ajdusting the r g b controls so that black and white is normal is what you want to do.
the crt board has the screen bias voltage 800volts on it so be very careful and use an insulated screwdriver to adjust the drive controls.
Any TV repair center should be able to run a degauss coil over the unit and see if it's caused by the tube being magnetized. If that doesn't fix the issue then they can install magnets on the outside of the tube to clear that green shading issue.