32
Chapter 4. Troubleshooting
Incorrect characters appear on the screen.
Are the operating system or programs installed correctly? If they are installed and configured
correctly, have the computer serviced.
Sleep problems ..............................................................................................................................................................................................................................................................................................
The critical low-battery error message appears, and the computer immediately
turns off.
The battery power is getting low. Connect the ac power adapter to the computer.
The computer enters sleep mode immediately after Power-on self-test (POST).
Make sure that:
• The battery pack is charged.
• The operating temperature is within the acceptable range. See “Chapter 2. Use and care Information” in the
Lenovo Safety and General Information Guide.
Note: If the battery pack is charged and the temperature is within range, have the computer serviced.
The computer does not resume from sleep mode, and the computer does not
work.
• If your computer is in sleep mode, connect the ac power adapter to the computer and then press the Power
button.
• If the system still does not resume from sleep mode, stops responding, or cannot be turned off, reset the
computer. Unsaved data may be lost. To reset the computer, press and hold the Power button for eight
seconds or more. If the computer is still not reset, remove the ac power adapter.
Battery pack problems ............................................................................................................................................................................................................................................
Battery status icon displaying status incorrectly
Your computer shuts down before the battery status icon shows empty, or your computer
continues operating after the battery status icon shows empty.
• Recharge the battery.
