Troubleshooting Charts
Indicator Problems
Problem Action
The battery status indi-
cator does not go on
even though a battery
pack is installed in the
computer.
The over-current protection device inside the battery pack has been activated.
Wait several hours and try again. If the indicator still does not go on, replace the
battery pack or have the computer serviced.
Battery Problems
Problem Action
The battery pack cannot
be fully charged in 3.5
hours by the power-off
charging method.
The battery pack might be over-discharged. Do the following:
1. Turn off the computer.
2. Make sure that the over-discharged battery pack is in the computer.
3. Connect the AC Adapter to the comptuer and let it charge.
If the battery pack cannot be fully charged in 24 hours, use a new battery pack.
Your computer shuts
down before the battery
status indicator shows
empty.
-or-
Your computer operates
after the battery status
indicator shows empty.
Repeat discharging and charging the battery pack at least three times.
The computer does not
operate with a fully
charged battery pack.
The over-current protective function in the battery pack might be activated. Turn
off the computer for 1 minute to reset this function; then turn it back on again.
The battery pack cannot
be charged.
The battery pack might not be able to charge when it is hot. In this case, remove
it from the computer and leave it at room temperature for a while. After it cools
down, reinstall it and recharge it. If it still cannot be charged, have it serviced.
118 ThinkPad 390X User's Reference
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