[kevin44]

I have been using this setup for a while and lately I have not been able to get a picture. I replaced my cable a vga to 5 rca, this tv has RBGWY connection. If I turn off the hd receiver signal I can get a picture on a s-video or composite input. Everytime I try to use the HD input I get a blue screen and sometimes I get a picture, but it's always rolling on the screen and then it's gone. My question is what is the best way to troubleshoot this?