A:Answer Disclaimer: In no way do I mean to be condescending or demeaning.
1. Completely disassemble the unit, and then re-assemble it as per the unit's instructions.
2. Ensure that all connections are solid and secure (into the unit, into the outlet).
3. Ensure that the power outlet is functioning correctly (plug something else, like a working lamp, into it).
4. If it still fails to power on, contact the manufacturer.