Display problems..

I have a Inspiron 15R 5010-5345.

Yesterday the screens started to display noise and squares ...

After while it came to normal...

This morning opens normally and after while starts to do the same. 

I check it on external screen via HDMI and the problem is the same..

I think it's the graphics card (ATI 5470)..

Any solutions ?

The laptop it's out the warranty .. Day of purchase 24/12/2010