Maintenance and Troubleshooting
107
When pressing the
power button the
device does not turn
on but two LEDs
blink.
Battery charge is at a
level where data is
maintained but battery
should be re-charged.
Charge or replace the battery in the device.
Battery did not
charge.
Battery failed. Replace battery. If the device still does not operate,
perform a reset.
Device removed from
cradle while battery was
charging.
Insert device in cradle. The 4,620 mAh battery fully
charges in less than five hours at room temperature.
Extreme battery
temperature.
Battery does not charge if ambient temperature is
below 0°C (32°F) or above 40°C (104°F).
Cannot see
characters on
display.
Device not powered on. Press the Power button.
During data
communication with
a host computer, no
data transmitted, or
transmitted data was
incomplete.
Device removed from
cradle or disconnected
from host computer
during communication.
Replace the device in the cradle, or reattach the
communication cable and re-transmit.
Incorrect cable
configuration.
See the system administrator.
Communication
software was incorrectly
installed or configured.
Perform setup.
During data
communication over
Wi-Fi, no data
transmitted, or
transmitted data was
incomplete.
Wi-Fi radio is not on. Turn on the Wi-Fi radio.
You moved out of range
of an access point.
Move closer to an access point.
During data
communication over
WAN, no data
transmitted, or
transmitted data was
incomplete.
You are in an area of
poor cellular service.
Move into an area that has better service.
APN is not set up
correctly.
See system administrator for APN setup information.
SIM card not installed
properly.
Remove and re-install the SIM card.
Data plan not activated. Contact your service provider and ensure that your
data plan is enable.
During data
communication over
Bluetooth, no data
transmitted, or
transmitted data was
incomplete.
Bluetooth radio is not
on.
Turn on the Bluetooth radio.
You moved out of range
of another Bluetooth
device.
Move within 10 meters (32.8 feet) of the other device.
No sound. Volume setting is low or
turned off.
Adjust the volume.
Table 17 Troubleshooting the TC72/TC77 (Continued)
Problem Cause Solution