Operating Instructions

Troubleshooting
General information
If you experience any trouble while using the unit, refer to the information in this section for troubleshooting.
If the problem persists, contact your technical support representative.
Starting up
The unit does not turn on.
• To turn the unit on, press and hold (power button) for more than 2 seconds.
• The battery level may be low or completely discharged. Charge the batteries or replace with
fully-charged ones.
• The unit may be too hot or too cold. Leave the unit in an environment of 10 °C to 35 °C (50 °F to 95
°F) for about an hour, and then try again.
• Install the batteries correctly.
Other startup problems
• Disconnect and remove all peripheral devices.
Shutting down
The unit does not turn off.
• It may take one or two minutes for the unit to turn off. This is not a malfunction.
• Press and hold (power button) for at least 10 seconds to force the unit to restart, and then try
again.
• Disconnect and remove all peripheral devices.
Screen
Nothing appears on the screen.
• The screen turned off automatically (sleep) because the unit has not been used for a certain period
of time. Press
(power button).
• The batteries may have become completely discharged while the screen was off. In this case, any
data which has not been saved will be lost. Charge the batteries or replace with fully-charged ones.
• The unit may be too hot or too cold. Leave the unit in an environment of 10 °C to 35 °C (50 °F to 95
°F) for about an hour, and then try again.
The screen is too dark.
• The [Adaptive brightness] setting reduced the brightness according to the ambient brightness.
Manually adjust the screen brightness.
1. Swipe up the home screen, and then in the app list, tap [Settings] ® [Display] ® [Adaptive
brightness].
2. Tap [Adaptive brightness] switch to turn it off.
3. Tap , and then tap [Brightness level] and adjust the slider.
• The [Minimum limit brightness] setting of customized silent mode was turned on. Turn off the
setting.
1. Swipe up the home screen, and then in the app list, tap [Settings] ® [Sound] ® [Customized
silent mode].
Operating Instructions - Reference Manual 57
Troubleshooting