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Maintenance & Troubleshooting

7 - 3

Mobile computer does 
not turn on.

Lithium-ion battery 
not charged.

Charge or replace the lithium-ion battery in the mobile computer.

Lithium-ion battery 
not installed 
properly.

Ensure battery is installed properly. See Installing and Removing 
the Main Battery on page 1-6.

System crash.

Perform a warm boot. If the mobile computer still does not turn on, 
perform a cold boot. See Resetting the Mobile Computer on page 
2-49.

Rechargeable 
lithium-ion battery did 
not charge.

Battery failed. 

Replace battery. If the mobile computer still does not operate, try a 
warm boot, then a cold boot. See Resetting the Mobile Computer 
on page 2-49.

Mobile computer 
removed from cradle 
while battery was 
charging. 

Insert mobile computer in cradle and begin charging. The 
lithium-ion battery requires less than four hours to recharge fully.

Cannot see characters 
on display.

Mobile computer not 
powered on.

Press the Power button.

During data 
communication, no 
data was transmitted, 
or transmitted data 
was incomplete.

Mobile computer 
removed from cradle 
or unplugged from 
host computer 
during 
communication.

Replace the mobile computer in the cradle, or reattach the 
Synchronization cable and re-transmit.

Incorrect cable 
configuration.

See the System Administrator.

Communication 
software was 
incorrectly installed 
or configured.

Perform setup. Refer to the MC909X Integrator Guide for details.

Ensure that Microsoft ActiveSync 4.1 or greater is installed on the 
host computer.

No sound is audible.

Volume setting is low 
or turned off.

Adjust volume.