Unhook every thing but the DVD player, any lines???
If none then add the Pioneer receiver, any lines??
You keep adding until the problem occurs then repost with the info. John
I have a Pioneer VSX-9110TXV-k receiver with a Time Warner supplied Cable box connected via HDMI to my Panasonic TH-50PX77U PLASMA TV.
I get rolling horizontal line on the picture. But they appear to be worse when playing TV versus watching a DVD.
Have replaced the cable between the Settop box and the receiver but did not correct the problem.
Any suggestions much appreciated.