48
Chapter 5. Troubleshooting
Keyboard problems
A number appears when
you enter a letter.
•
The numeric lock function is on. To disable it, press
Fn+F8
.
Sleep or hibernation problems
The computer enters sleep
mode unexpectedly.
•
If the battery 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 immediately after
Power-on self-test (POST).
•
Make sure that:
- The battery is charged.
- The operating temperature is within the acceptable
range. See “Appendix B. Use and care
information” on page 70.
Note:
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.
Summary of Contents for 08772BU
Page 1: ...U460 User Guide V1 0 cover_1 4 Lenovo IdeaPad U460 User Guide V1 0 ...
Page 6: ......
Page 21: ...Chapter 1 Getting to know your computer 7 Bottom view 4 3 7 1 2 5 6 6 ...
Page 128: ...114 Appendix E Notices Lenovo Product Service Information Japanese VCCI Class B Statement ...
Page 143: ...New World New Thinking TM www lenovo com Lenovo China 2010 P N 147003310 Printed in China ...