Can anybody offer some advice. I've been having a problem with my macbook pro since last October. On the login screen the screen breaks up into various different colours. I had in to an Apple store twice. The first time they told me it passed all the test they could do and didn't find an issue and the second time they replaced the logic board and the screen. However, the problem is still as bad as ever. I'm starting to lose my patience with it as it been going on for so log and still not been fixed. I attached some pictures of the problem. All these pictures have been times it has happened since the logic board and screen were replaced. It is still under apple care until April of this year. Any advice would be appreciated.