User's Manual

CHAPTER 5. TROUBLESHOOTING
34
 Touch the touch pad.
 Press any key.
 Press the power button.
Keyboard Problems
A number appears when you enter a letter.
The numeric lock function is on. To disable it, press Fn + Insert.
All or some of the keys on the external numeric keypad do not work.
Make sure that the external numeric keypad is correctly connected to the
computer.
Sleep or Hibernation Problems
The computer enters sleep mode unexpectedly.
If the processor overheats, the computer automatically enters sleep mode to
allow the computer to cool and to protect the processor and other internal
components. Check the settings for sleep mode.
The computer enters sleep mode (the sleep indicator turns on)
immediately after Power-on self-test (POST).
Make sure that:
 The battery is charged.
 The operating temperature is within the acceptable range. See
“Appendix A. Specifications”.
If the battery is charged and the temperature is within range, have the
computer serviced.
The critical low-battery error message appears, and the computer
immediately turns off.
The battery power is getting low. Connect the AC adapter to the computer,
or replace the battery with a fully charged one.
The computer does not return from sleep mode, or the sleep indicator
stays on and the computer does not work.