Ok let me lay out the situation for ya here.
I have a konka dvd player for my home theater system, i have a kenwood home theater system, both are only around 1 year old.
It worked great for a long time but just the other day i was cranking out the tunes real loud and the next day i went to watch a dvd but everytime the volume is anything over wispering little black wobbly lines apear on the screen..............now thats only happening when i use it with my digital coax cable as my sound input output dolby digital 5.1,so if i change the setup back to just dolby surround and unhook the digital wire it doesnt do it....................so im asuming its the wire, BUT!!! it doesnt do this at all when i play vcd's in dolby digital.
If anyone could give me any idea of whats wrong that would be great and if you need any more info just ask.

Thanks.

Matt. :o)