I just realized there has been some very active debate since I've posted the issue and thanks to everyone who replied, understand that this not a Bose friendly forum. Folks who have tried to point out some specific things to try- Thank You, I will try the 1.5V battery idea with speaker.
Here is the latest:
By process of elimination and swapping wires & audio input device I've eliminated the Bose subwoofer as the issue. I connected an audio device to the Kenmore receiver and connected a set of non-bose speakers to the subwoofer and everything worked fine.
To the above set up then I replaced the audio unit with my new Samsung TV (direct connection, switched TV speakers off) and I get a loud humming sound with the audio in the background. Also the receiver had a setting to increase the resistance to over 8ohms, tried that without luck
Finally I replaced my non-bose speakers with the bose speakers and the sound is back to the subwoofer.
The above points out to three things, the output from my new Samsung TV is not compatible with the Kenmore receiver (Issue 1), there is a "connection issue" from my subwoofer to Bose speaker (Issue 2) or both my cube speakers conked at once (Issue 3), the last one is hard to believe
I thought I will just share, any pointers are welcome with all due respect to the members here!