Power Problems - Lenovo ThinkPad P70 User Manual

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. Also the ac power
indicator does not light up.
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, and then disconnect the ac
power adapter and remove the removable battery.
3. Reinstall the battery and reconnect the ac power adapter, and then turn on the computer.
4. If the power adapter icon still is not displayed in the Windows notification area, have the ac power
adapter and your computer serviced.

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. The power button is illuminated whenever the computer is on.
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.
If your computer does not run on battery power, check the following items:
1. Remove and reinstall the removable battery to make sure that it is properly connected.
2. If the battery runs out of power, attach ac power adapter to recharge the battery.
3. If the battery is charged but the computer does not run, replace the battery with a new one.
Problem: The system does not respond, and you cannot turn off the computer.
Solution: Turn off the computer by pressing and holding the power button for 4 seconds or more. If the
computer is still not reset, remove the ac power adapter and the battery.
Boot problems
Print these instructions now and keep them with your computer for reference later.
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Chapter 8 Troubleshooting computer problems
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