HS103 v2 smart plug won't turn on

The hardware itself (ie. the smart plug) will not turn on. I've tried in multiple outlets around the house that I know work and are powering other devices. No lights turn on when I plug the unit into the wall. I've tried pressing and holding the power button for 10 seconds + while plugged in and to no avail.

Note: the unit was working and I have other units in the home that still work fine. 

What happened? Is this just a failed unit?

Please help!

Thanks,

Yot