Bose acoustimass powered speaker system 1989 sub not working. no power

I WAS GIVEN A SUB FROM A BOSE ACOUSTIMASS POWERED SPEAKER SYSTEM, 1989. S/N 224938

D.O.M. A9431... WAS TOLD IT WAS WORKING WHEN IT WAS STORED AWAY. NOW WHEN I PLUG IT INTO A WALL ELECTRICAL OUTLET. THERE IS NOTHING. NO NOISE OR ANYTHING. EVEN WHEN I TURN IT ON.  WHAT COULD BE THE PROBLEM???? AND HOW CAN I CHECK TO FIND OUT WHAT THE PROBLEM IS?? 

THANK YOU

ANTHONY CRESCENZO

tonycrescenzojr@gmail.com