quick question. I have a 2012 mac book pro that has developed an issue. to start off with it did get a small amount of rain on it whilst it was closed, this may or may not be a factor. The mac hasn't been used for about 4 weeks, I've tried to turn it on and it wont power on. If I disconnect the battery and then reconnect then it starts up but the keyboard / mouse doesn't work (does with USB). If I power it up and then turn it off it refuses to repost without the battery being disconnected. Any ideas? I don't want to go through insurance atm as the excess is £200