Okay if you aren't even seeing the green status light at the lower left corner on the front of the bose, that would indicate an internal hardware defect. This issue could be a manufacturing defect, but is also often caused by a power event (shock/surge, prolonged over/under voltage condition, etc).
There is one step you can take here, both as a possible fix, as well as a diagnostic evaluation:
1) Unplug the power cord from the outlet
2) Wait at least 1 hour (60+ Minutes)
3) Press and hold the power button
4) Keep holding power button while plugging back in, and for another 60 seconds after. When plugging back in, go directly to the wall outlet, bypassing any power strips or surge protectors.
If this reset process does not work, it would unfortunately confirm an internal hardware failure.
You mentioned it was a year old - if less than a year you'd be covered under warranty. If more than a year old then bose wouldn't cover it, and at that point you're actually better off buying a new soundbar, it would cost more to repair it than to replace it.
Depending how you’d like to proceed here, I can help with repair options, or recommending replacement options. Just let me know.
Best regards, ***** ***** for the news,