Hi Ray,
if there is no power going thru than,might probably be your fuse in the subwoofer that's blown.What you have to do is remove the wire mesh from the front using a terminal flat screw driver. You will notice that there are screws around the speakers,remove them inorder to take the speakers out.Once you've done that take out the speakers gently so that you dont disconnect any wires inside.Turn the peakers over and you will see a fuse attached to the speaker.Try replacing the fuse with the asme ratings.
Please refer to the image below on what the back of the peaker looks like.
All the best and Good Luck.
G..
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