So I had a problem with my iMac 2 weeks ago. I turned it on and it would not go past a blue boot screen. All I could do was boot in safe mode. I tried all the suggestions I could find on several forums and when I started to get lines across the screen I decided to take it to a shop to get it looked at. The shop is now telling me that it is a logic board issue and he can either rebuild it for $250 or order a new logic board from apple and do it for $500. He said there is only a 80% chance that this will fix the problem. My question to you is does this sound legit? My experience in the past with logic boards is once they fail the computer won't do a thing, not even boot in safe mode. I'm afraid that once this guy fixes the logic board, there will be other problems and this repair will snowball and end up costing half what a new computer would cost me. Plus I don't want to pay him $250 to 'play around' and try to fix it. If I'm going to pay him, I want it fixed. What do you think? My computer is only 5 years old, which if pretty young for a Mac. I appreciate any and all feedback.