I knocked my MacBook a little and the screen suddenly went like this:
Click for large view - Uploaded with Skitch
not sure quite how to describe it to find out if anyone else has had this problem.
I held the button down to power off and then turned it on again, which worked fine until I moved the MacBook slightly, and the same thing happened but its powered on again fine (if maybe slightly slower).
I installed Lion when it came out but I've not had any other problems. I also replaced some ram about a month ago.
Can anyone help tell me whats wrong?

not sure quite how to describe it to find out if anyone else has had this problem.
I held the button down to power off and then turned it on again, which worked fine until I moved the MacBook slightly, and the same thing happened but its powered on again fine (if maybe slightly slower).
I installed Lion when it came out but I've not had any other problems. I also replaced some ram about a month ago.
Can anyone help tell me whats wrong?