Right, so spilt a bit of water on it, thing turns off, so i turn it back on, it works for like 5 minutes and won't switch on again

. so i've taken it to the apple store and the guy had a look and said it was water damage and wanted £500 for a replacement logic board

. Sooo i was like nahhh might try and get it fixed elsewhere, anyways I then don't touch the laptop for about 2 weeks whilst i'm looking for someone to repair and just thought i'd give it a go and try and turn it on and it works just fine!!!!
Basically I was wondering why this could have happened??
Cheers