[mythtv-users] pvr-500 strange lines

[JJ]

(snipp)
Looks exactly like a ground voltage difference in the two units, can you 
possibly
ground the computer case to the unit, that *should* eliminate your shock
potential between them, and possibly clear up those 60-cycle bars in 
your video
    I've had these issues before also, especially on my long 50-foot run of
s-video cable, hum bars in my video, grounded both systems to each other and
my video cleaned up!
HTH
Cheers,
John