Lenovo IdeaPad U165 Lenovo IdeaPad U160/U165 User Guide V1.0 - Page 56
Troubleshooting, Sleep or hibernation problems, Power-on self-test POST.
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Chapter 5. Troubleshooting 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 70. 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. 42