So I thought I bought a good deal today for $250 at Goodwill Computer Works in Austin. A used 8,1 iMac 20", upgraded to 4 GB RAM. Before I dive into the problems, here is some background that may be of note: 1. No optical drive - broken and removed. Optical fan constantly running (from startup) @ 5000+ RPM. With no optical drive in it, should I shut it off with a fan control program or disconnect the ODD fan? 2. Color line down the screen (see pic in link below). "Infrared" type. 3. Non-Apple power cord. Don't think it's meant for this machine. 4. When I took it apart to inspect the cables and give the insides a good cleaning, I noticed a couple of things: Whoever put it together did a rush job - back case was misaligned (rubber pieces at the bottom weren't properly put in place when the chassis was put back together). Many of the screws were missing - here is my count so far: Eight 13 mm T8 Torx (front bezel to the rear case) - there were only 4 different, obviously non-standard screws securing the bezel to the rear case) Four 25 mm T8 Torx (front bezel to the rear case) Two 5.3 mm T6 Torx screws securing the data display cable to the logic board All the cables seemed fine. Gave it a general cleaning - still the line. When hooked to an external monitor, the line disappears. Noticed memory had been upgraded to 4 GB - and access door is missing : ) With all this, where should I start? First thing I want to do is correct the graphics problem (just noticed that when it went to white screen during a restart (installing Lion) the "bar" went away). However, upon full boot it's still there. Could the missing screws or optical drive be causing the graphics issues? Bad cable? Bad video card? Bad screen? See the link below for pictures of iStat and the screen problem. Notice the graphics problem doesn't show up in the screen shot - same with a full screenshot. https://picasaweb.google.com/113908758772761244168/IMacProblems?authuser=0&feat=directlink Thanks for your help, and thanks to MacRumors for being an awesome resource!