When the unit is off, it may not respond to pressing the [Power] button and/or [ASSIST] button.
In order to power the unit on, proceed as indicated below.
- Disconnect the power adapter.
- Push and hold the battery OFF button for 3~5 seconds with a thin straight object, e.g. a paper clip.
- Connect the AC adapter. The LED on the ACAD should be green when plugged into the power supply.
- Press the [Power] button.
If above steps do not solve your issue, you may need to arrange a repair.