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Vertical White Lines problem on Altera NEEK (Video tutorial)

Altera_Forum
Honored Contributor II
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I am a beginner with FPGA's and have a lot of software engineering experience. By following the Altera VIP tutorial http://www.alterawiki.com/wiki/altera's_video_and_image_processing_suite_demo_on_the_neek I encountered a problem. 

My LCD screen shows a black screen with vertical white lines in it. This is the case with the .flash files and also if I generate and build the qsys system myself. 

 

Anyone knows why it shows white/black vertical stripes? I am expecting to see my video input or at least a blue screen.
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