Battery Problems; Ac Adapter Problems - Lenovo 7417P9U - Tp T400 C2d/2.4 14.1 2Gb 160Gb Dvdr Wls 6C Wvb Service Manual

Battery problems

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AC adapter problems

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ThinkPad T400 and R400 Service and Troubleshooting Guide
The battery does not charge.
-or-
The operating time for a fully charged battery is short.
-or-
The battery cannot be fully charged by the power-off method in the standard
charge time for the computer.
For details, see "Problem solving" in Access Help
The computer does not operate with a fully charged battery.
The surge protector in the battery might be active. Turn off the computer for
one minute to reset the protector; then turn on the computer again.
The computer shuts down before the battery status indicator shows empty.
-or-
The computer operates after the battery status indicator shows empty.
Discharge and recharge the battery.
The AC adapter is connected to the computer and the working electrical
outlet, but the power adapter (power plug) icon is not displayed on the task
bar. Also the AC power indicator does not light up.
1. Make sure that the connection of the AC adapter is correct. For
connecting the AC adapter, see the Setup Instructions manual included in
the shipping contents of your computer.
2. If the above step is correct, turn off the computer, then disconnect the AC
adapter and uninstall the main battery.
3. Reinstall the battery and reconnect the AC adapter, then turn on the
computer.
4. If the power adapter icon still does not appear on the task bar and the
AC power indicator does not light up, have the AC adapter and your
computer serviced.