I have a green tinted display, with some horizontal lines crossing the screen. Is this 2003 model 51G500A projection set worth repairing, or would it be advisable to purchase another set? Is it a matter of simply changing a tube?

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.

When I was reading the instructions for this tv, It was saying if the projection bulb is reaching the end of its life you will get strange color changes. You can also reset your settings in the setting section. Go to your menu and go to settings and them picture. You can reset your picture to factory settings in this menu. Now you can reset in different modes also. You have to be in these modes to set factory settings. These are Vivid, Standard and Custom. Take a look. You can go to sony and it tells you haw to do all of this. You punch in your TV type and you can go into the instructions. I learned how to change my projection lamp.

Replaced convergence ics. This set is old and if colors especially red are flagging crts are going bad . I would not repair a set this old .

Green and Red guns seems defective and requires replacement.
Both guns (CRTs) are no longer available so TV has no worth to repair.

Check this link it will (should) resolve your issue.

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

need to replace both Convergence ICs number STK392-110 you can het replacements here and they provide free instalation instructions and free on line tech support so you can do the repair yourself. heres the link.
http://servicemanuals.vstore.ca/

Note: unmatched Make / model info........please clarify...T.

Always try your extended warranty!.....Probable cause = bad
red tube. One adjustment may help---turn down red screen
control, located behind technician access panel in front of set.

2003-2004 Model Year Grand WEGA Televisions:

Models: KF-42WE610, KF-50WE610, KF-60WE610, KDF-70XBR950, KDF-60XBR950, KDF-42WE655, KDF-50WE655, KDF-55WF655, KDF-60WF655, KDF-55XS955, KDF-60XS955, KF-42WE620, and KF-50WE620.

As technology evolves, Sony continually looks to stand behind the reliability of its televisions. It has come to our attention that a very limited number of televisions manufactured between 2003-2005, after a period of time exhibit a stationary scribble / random line pattern on the screen. Click here to see photos of this symptom.

As part of our commitment to quality, Sony is announcing that for any owner of this model television who paid out-of pocket expenses on or before May 26, 2006 for an estimate or repair service to replace the optical block for this specific issue, Sony will reimburse the customer by mail for his/her parts and labor expenses. To receive reimbursement, please follow completely the directions and terms on the claim form for reimbursement; all claims must be postmarked by May 31, 2007.

In addition, for any customer who later experiences this issue on one of the affected models, Sony will cover the cost of the optical block repair at no charge through September 30, 2007. All other terms of the Sony limited warranty continue to apply.

Took mine to a repair shop and they said there was an issue with the line something? circuit board. Quoted me 225 parts 450 parts+labor. Mine was a red tinted screen.