My mum has got a 50inch Pioneer rear projection TV. It's been fine for 3 1/5 years, but today, very suddenly, the red has been thrown off to the left by about 5 inches. I've tried setting the convergence, but it wont allow me to move the red inline with the green and the blue. The green and the blue are perfectly in line, and you can see the red is also distorted. She has phoned Pioneer but they will only send an engineer at a silly price. I've had the screen off and the bottom cover, but cant see anything a miss. I know it's a long shot, but any ideas??