Yesterday I notice that the sound from the left channel was not the same as the right one, the problem come and go it was very frustrating, it sound like bad contact, I try all the channel I have and with different cable but nothing helped, today I have tested it more and can not hear anything wrong but when I lift the Audya upside down I can hear that inside there is a metal piece loose so I can someone give me instruction how to open and remove the metal piece, maybe it¨s a soldering that cause me the problem