Hi all. I have a mid 2007 24" iMac I picked up from a friend for dirt cheap since he was having issues with it and already had a new computer. The computer was working fine until he started uploading 15k+ songs to Google Music and he received an error message that took over the whole screen and made him restart the computer. It boots back up and stays on for a few minutes and then the error message comes back up (written in multiple languages) and then has to be turned off again. I never took it to a shop or anything after buying it but he told me he thinks that it is the logic board that is bad. I found a few online for about $250.. but my question is how hard is it to install / replace the logic board? I'm not 100% sure if it is the logic board either. I can boot it back up tomorrow and post a picture of the error message that pops up after it has been on for a few minutes if that helps. I didn't know if it would be worth taking in to a store to have it diagnosed or if anyone could give me more of a definite answer. The computer is in absolutely pristine condition, has the box with all accessories and would be a great computer for me to give to my dad or just use in the spare room here! I'd hate to see it go to waste or have to spend more than its really worth to fix. Here is a link to the model of the computer: http://www.amazon.com/Apple-Desktop-Display-MA878LL-SuperDrive/dp/B000R805L4 I'll post up a picture of the error message once I get it hooked up again. Thanks!