I just bought a broken imac with hopes of fixing it. It starts runs for some time and than it trows red lines on the screen and freezes. I made a vidio of it for batter explenation. http://www.youtube.com/watch?v=SU0Div21RD4 Please skip to 3rd min. I took it apart and capacitors looked fine. 17" iMac G5 with iSight, 150 gig hard drive, 1.5 gigs DDR2 ram, DVD+R DL/DVD±RW/CD-RW SuperDrive, AirPort Extreme, Bluetooth Please advise.