Check the power cord. It's a 30-foot manual-wind cord. Unwind it fully from the unit and plug it directly into a working wall outlet. If it still won't power on, inspect the cord for damage.
- Unplug the vacuum.
- Unwind the entire 30-foot cord from the cord wrap on the back of the unit.
- Plug the cord directly into a different wall outlet you know is working.
- Try the power switch.
If that didn't work, the issue could be internal. There are no user-serviceable fuses. You'll need to contact Shark for service under the 3-year warranty.
Heads up: Always fully unwind the cord before use to prevent overheating and damage to the internal wiring.