The power unit does not seem to be getting any electricity.

• Check the house circuit breaker.
• Try plugging the vacuum in another outlet.
• Confirm that you have the correct sized circuit  breaker for the power.
• Confirm that the circuit breaker is not overloaded.
• Continually recheck the system after you get power to see if it was the vac that had tripped the circuit.
• If all else fails, contact an electrician.