Sony KP-43T75 color repair

This link has the instructions on how to fix this problem and other similar problems. You have nothing to lose, so I recommend that you try it.

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

This works with the two other colors, blue and green also. Not all models of Sony Projection TVs have the red, green, and blue pots in the same order as the picture that is listed on this link, so you may want to google search for your model's service manual. The service manual can also help you be able to remove the cover for your particular model of TV. I was able to find the service manual for my model, and sure enough, the order of the pots are reversed on mine, so I would have been adjusting the wrong color. Read all of the comments on this link too, because you can find other helpful tips and may even find someone with the same model of TV as you that gives more specific instructions for your model.

You may also find your model's service manual here:
http://esupport.sony.com/US/perl/index.pl
I hope this helps you!

Fare well. :)
Iconoclast

I've had a convergence issue with my KP-43T75 and recently the TV made a "pop" noise and the picture+sound went out. The standby light repeatedly blinks twice over and over. Holding power button on startup causes a long blink, then the double blinks start and repeat.

I understandthat replacing the entire G Board (A-1316-471-A) will replace both problems but I can't find the part in stock, though I've seen it listed for $200. Any leads?