So a co-worker has a black MacBook that his family managed to spill some liquid on. It no longer works properly, of course. He just wants to get a new computer, so he's giving it to me. I'll get all of his data off the HDD for him and then I can keep the MacBook. It's definitely a big step up from my PowerBook in terms of speed and performance (I'll miss the dedicated card and FW800, though). I figure it can't hurt to try to clean the motherboard/logic board in the computer to see if I can get it running. Worse comes to worst, I can buy a new logic board for the computer and put it in and be set. Some questions: - What's the best way to clean a motherboard? I've seen everything from isopropyl alcohol to distilled water to just a gentle detergent and warm tap water. Any suggestions? - What's a good way to tell what model the computer is from the serial number? I will get the actual computer tomorrow, but my co-worker can't remember which model it is. From my research it could be anywhere between the 2 GHz and the 2.4 GHz, though he bought it refurbished from Apple last year so I'm guessing it's the 2.4 GHz model. - If the logic board is shot, and it's not the 2.4 GHz model, does anyone know if the 2.4 GHz board can be put in a non-2.4 GHz machine? It's not every day one comes across a free Mac, so it's definitely something to put some effort into. Once I max out the RAM and put a new drive in (maybe even an SSD in an optibay) the computer should be quite capable.