PowerPC :: Repair Extension Program For The Powerbook G5?

My neighbor's 3 year old iMac G5 (iSight) recently developed the all-too-common lines problem. She took it to the genius bar and they told her it would be $760 to fix. This was rubbish, so I set her up with an external monitor until I could figure something else out.Today, I decided to call Apple and try my luck at getting them to repair it for her. The first person I talked to told me to take it to the genius bar, so I asked politely to speak to his supervisor. At first, he tried to tell me about the repair extension program for the power issue, which this computer was not eligible for, though the serial number was close. He thought the problem was related to that. I told him several times that it was not related in any way. I then explained to him that I felt Apple should fix the screen free of charge because it was a defective product. He then said "I'm going to have to say no. You've used the computer for almost three years, I don't see how that is defective" I countered back by saying that it was not an isolated issue and that hundreds of people are having the same problem with their computers in the same serial number range.