U.M. Android v5.1.1

Maintenance and Troubleshooting 7 - 5
Troubleshooting
ET5X
Table 7-1 Troubleshooting the ET5X
Problem Cause Solution
ET5X does not turn on. Battery not charged. Charge the battery in the ET5X.
Battery not installed
properly.
Ensure battery is installed properly.
System crash. Perform a warm boot. If the ET5X still does not turn on,
perform a cold boot. See Rebooting the ET5X on page
2-18.
Battery did not charge. Battery failed. Replace battery. If the ET5X still does not operate, try a
warm boot, then a cold boot. See Rebooting the ET5X on
page 2-18.
ET5X removed from
cradle before
charging completed.
Insert the ET5X into the cradle and begin charging. The
battery fully charges in approximately four hours.
Ambient temperature
of the cradle is too
warm or too cold.
The ambient temperature must be between 0°C and 40°C
(32°F and 104°F).
Unable to connect to
the wireless network.
SIM card is valid. Ensure that the micro SIM card is valid and workable if
using a mobile network.
Not within range of
network.
Move within the network’s service range and the signal
strength is good.
ET55 is in airplane
mode.
Ensure that ET55 is not in Airplane mode.
The multi-touch screen
responds slowly or
improperly.
Finger or screen is
wet.
Ensure that your hands are clean and dry when touching
the screen. Restart the tablet to try again.
ET5X turns itself off. ET5X is inactive. The ET5X turns off after a period of inactivity. If the ET5X is
running on battery power.
Battery is depleted. Place the ET5X in the cradle to re-charge the battery.
The ET5X’s battery
is low and it powers
down to protect
memory content.
Place the ET5X in a cradle to re-charge the battery.