Instruction Manual

MAX-700 319
21 Troubleshooting
Solving Common Problems
Unit-Related Problems
Problem Cause Solution
Unit does not turn on. Battery is discharged.  Charge the battery.
 Replace the battery with a fully
charged one.
 Connect the unit to an external
power supply using the AC
adapter/charger.
Unit is not connected
to an external power
supply.
Connect the unit to an external power
supply using the AC adapter/charger.
External power supply
is disconnected.
Make sure the external power supply
is connected at both ends.
Unit screen
is dark.
Unit’s backlight is off. Press the backlight button.
Battery is discharged
and unit has shut
down.
 Charge the battery.
 Replace the battery with a fully
charged one.
 Connect the unit to an external
power supply using the AC
adapter/charger.
External keyboard is not
working.
External keyboard has
not been detected.
 Disconnect the keyboard, and
then connect it again.
 Turn off the unit, connect the
keyboard, and turn on the unit.
Screen characters are
dim.
Brightness is not set
properly.
Adjust brightness.