Dear Everibody

I have got the Gumstix pack (Overo FE COM and Chestnut43 expansion board 4,3"LCD). I have Assembled the Stix. There is not any definite picture on the LCD. What I can see are black vibrant lines on white background. 
Only a kind of setting is missing, or is it a more serious problem? 
I have used a new software from the ”Pre-Built Images”, but nothing changed. I have modified the default display variable as it was written on the Gumstix website. 

Thank you for your help, 

Best regards
Ferenc Koszegi