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Chapter 4 — Troubleshooting and Maintaining the CN4
90 CN4 Mobile Computer User’s Manual
Problems While Operating the CN4
Problem Solution
You press the Power button and
nothing happens.
Make sure the backlight is on.
Make sure you have a charged battery that is installed
correctly. For help, see “Charging the Battery” on
page 4.
Replace the battery with a charged battery. For help,
see “Changing the Battery” on page 4.
Perform a warm boot or a cold boot. For help, see
“Resetting the CN4” on page 97.
The Battery status LED is on. The battery status LED indicates the following states:
If the battery status LED is a steady green, the battery
is more than 95% charged and computer is on a
charger.
If the battery status LED is blinking red, then the
battery is low. Replace or charge the battery.
If the battery status LED is a steady red, the main
battery is on charge.
If the battery status LED is amber, the CN4 is on
charge and either the battery temperature is outside
of the charging range, or the battery is defective.
The computer appears to be locked up
and you cannot enter data.
Press the power key to turn off the computer, then
press the power key again to turn it on.
Press and hold the power key ten seconds to warm
boot the computer.
Try reloading the firmware. See “Freeing Up Virtual
Memory for Applications” on page 80.
If the computer does not boot or reset, contact your
Intermec representative for help.
You tap the screen and nothing
happens.
Align your screen. For help, see Aligning the Touch
Screen” on page 21.
Problems With 802.11 Network Connectivity
Problem Solution
When you turn on the computer after it
was suspended for a while (10 to 15
minutes or longer), it can no longer
send or receive messages over the
network.
Host may have deactivated or lost current terminal
emulation session. In a TCP/IP direct connect network,
turn off the “Keep Alive” message from host to maintain
the TCP session while the computer is suspended.
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