Hey all, wondering if anyone might know what the issue is here. Late 2009 macbook 13in unibody. All the keys working fine in uppercase (capitals) but 4 keys (5,t,g,b) when in lower case are either not working or typing random letters numbers signs (ie: LiUoo%6*bn) i attached an external keyboard and lowercase works fine so not a text to speech issue Is this a shorted out issue as i think? As all keys are in a diagonal line. As i said, what confuses me is the keys all works fine with caps on. will it just take a new topcase? How much does this cost to repair (in the UK btw) any replies greatly appreciated.