Hi Ive recently purchased a used MacBook Pro A1342 with a non-functional keyboard. It had coffee spilled on it which has caused the keyboard to malfunction (not sure how long the coffee spill has been up to today since the accident). Everything else is working fine, it boots up no problem, screen works etc, even plugging in an external keyboard works fine as well. So I got a few questions now; 1) Whats the best way to tackle on cleaning the inside of the Macbook? Specifically the logic board? Would disconnecting it completely and soaking it in rubbing alcohol work ok? Or soaking it in distilled water and soap and lightly brushing? Is it even ok to soak a logic board with any sort of liquid? 2) What are signs of corrosion? Would corrosion occur if left uncleaned on the logic board? 3) Is it possible to replace just the keyboard it self? Or is the keyboard and base permanently attached and must buy one unit? Any help or advice is much appreciated, thank you in advance.