Has anyone had problems with 1 or more channels dropping out while playing DVD-Audio or SACD discs? Currently I have a Pioneer 563A Universal player connected throught the 6-channel input and am losing the left front channel. I am not sure if it is the player or if it is the 950. I am hoping it is the player. I get signal to all channels when testing the channels and when playing through the digital connection for DTS and DD.