When I press the on/off button on the Bose radio a loud pop occurs followed by a loud hum/buzz noise that quickly fades away. The clock works but nothing else. There is no sound from either AM or FM with both antenna's correctly connected. The Bose radio went unused (disconnected from ac) for a long time. This is an older AWR1 model. What could be wrong with this radio?

Audio Players & Recorders - Bose - Wave Radio