I have just bought a new toshiba SD-220E dvd. since cableing it up ,i now get a humming noise thru my speakers(centre seems to buzz sometimes as well). the amp is only set at -50db. it is connected to my sony str-db 1070 amp by optical digital cable & to my tv by scart. the only way to stop the humming(when you want to listen to radio or watch tv)is to disconnect the scart lead from dvd to tv. i have looked thru search with no results & had this same thread on dvd hardwear forum for 2 weeks without one reply!! i know this is a repeat but what else can i do??? can the a/v people do better???? thanks del.