> Is the keyboard battery powered or line powered? (I'm thinking ground loo= p) > > -Denny Line powered. Yea, maybe a ground loop but I'm not sure how that would=20 break it......There was no hum. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .