Lenovo U350 Lenovo IdeaPad U350 UserGuide V1.0 - Page 57

Troubleshooting, Keyboard problems, Sleep or hibernation problems, Power-on self-test POST. - not charging

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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 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 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 64. Note: If the battery is charged and the temperature is within range, have the computer serviced. The critical low-battery error • The battery power is getting low. Connect the AC message appears, and the adapter to the computer, or replace the battery with computer immediately turns a fully charged one. off. 43

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Chapter 5. Troubleshooting
43
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 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 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 64.
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.