Power Problems - Lenovo thinkpad L450 User Manual

If the battery cannot be fully charged in 24 hours, use a new battery.
• Problem: Your computer shuts down before the battery-status icon in the Windows notification area
shows empty, or your computer operates after the battery-status icon in the Windows notification area
shows empty.
Solution: Discharge and recharge the battery.
• Problem: The operating time for a fully charged battery is short.
Solution: Discharge and recharge the battery. If your battery operating time is still short, use a new battery.
• Problem: The computer does not operate with a fully charged battery.
Solution: 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.
• Problem: The battery cannot be charged.
Solution: You cannot charge the battery when it is too hot. If the battery feels hot, remove it from the
computer and allow it to cool to room temperature. After it cools, reinstall it and recharge the battery. If it
still cannot be charged, have it serviced.
An ac power adapter problem
Problem: The ac power adapter is connected to the computer and the working electrical outlet, but the
power adapter (power plug) icon is not displayed in the Windows notification area.
Solution: Do the following:
1. Make sure that the connection of the ac power adapter is correct. For instructions on connecting the ac
power adapter, see Safety, Warranty, and Setup Guide that comes with your computer.
2. If the connection of the ac power adapter is correct, turn off the computer, then disconnect the ac power
adapter and remove the main battery.
3. Reinstall the battery and reconnect the ac power adapter, then turn on the computer.
4. If the power adapter icon still is not displayed in the Windows notification area and the system-status
indicator does not blink three times when an ac power source is connected, have the ac power adapter
and your computer serviced.
Note: If you are using the Windows 7 operating system, to display the power adapter (power plug) icon, click
Show hidden icons in the Windows notification area.

Power problems

Print these instructions now and keep it with your computer for reference later.
If your computer is getting no power at all, check the following items:
1. Verify the power button. Refer to "Status indicators" on page 6.
2. Check all power connections. Remove any power strips and surge protectors to connect the ac power
adapter directly to the ac power outlet.
3. Inspect the ac power adapter. Check for any physical damage, and make sure that the power cable is
firmly attached to the adapter brick and the computer.
4. Verify the ac power source is working by attaching another device to the outlet.
5. Remove all devices and then test for system power with minimal devices attached.
a. Disconnect the ac power adapter and all cables from the computer.
b. Close the computer display, and turn the computer over.
.
Chapter 8 Troubleshooting computer problems
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