Picked up a B&K Ref 50 series 2, love the sound as I still have my Ref 20 and AV5000 amp. But after playing for 10 minutes or so or when I change volume the Ref 50 gives me and EE**** error and shuts off. I know B&K is no more. I tried reseting the unit but still the same. I know there is a place in NY that has some B&K parts but not all. Any ideas what it could be, Eprom etc?