please see this problem

[anti1130]

my air (2010 13")has this problem this morning. external monitor working fine.
screen seems no crack.
Is it logic board problem or screen or something else (connecting cable etc...)?

 

[Audit13]

I think it is the screen.

 

[Mrbobb]

1. PRAM Reset.
2. SMC Reset.

 

[Gav2k]

Try moving the screen around and see if the pattern changes. If it dosnt then. Hook up an external screen.

Pattern changing - damaged cable.

External screen displaying garbage hardware issue.