Lenovo B40-70 User Guide - Lenovo B40-xx, B50-xx, B50-30 Touch Notebook - Page 33

Chapter 4. Troubleshooting BIOS password problems I forgot my password. • If you forget your user password, you must ask the system administrator to reset your user password. • If you forget your HDD password, a Lenovo authorized servicer cannot reset your password or recover data from the hard disk. You must take your computer to a Lenovo authorized servicer or a marketing representative to have the hard disk drive replaced. Proof of purchase is required, and a fee will be charged for parts and service. • If you forget your Supervisor password, a Lenovo authorized servicer cannot reset your password. You must take your computer to a Lenovo authorized servicer or a marketing representative to have the system board replaced. Proof of purchase is required, and a fee will be charged for parts and service. 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, or replace the battery with a fully charged one. 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 "Chapter 2. Use and care Information" in the Lenovo Safety and General Information Guide. Note: If the battery is charged and the temperature is within an acceptable range, have the computer serviced. The computer does not return 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 Fn key or the power button. • If the system still does not return 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 4 seconds or more. 27