Lenovo IdeaPad Z510 User Guide - IdeaPad Z410, Z510 - Page 30

Chapter 4. Troubleshooting Troubleshooting Display problems When I turn on the computer, • If the screen is blank, make sure that: nothing appears on the screen. - The AC power adapter is connected to the computer, and the power cord is plugged into a working electrical outlet. - The computer power is on. (Press the Power button again for confirmation.) • If these items are properly set, and the screen remains blank, have the computer serviced. When I turn on the computer, only a white cursor appears on a blank screen. • Restore backed-up files to your Windows environment or the entire contents of your hard disk to its original factory contents using the Lenovo OneKey Recovery System. If you still see only the cursor on the screen, have the computer serviced. The screen goes blank while the computer is on. Password problems • Your screen saver or power management may be enabled. Do one of the following to resume from sleep mode. - Press any key on the keyboard. (Notebook mode only) - Press the Power button. - Press F9 ( ) to confirm whether the backlight of the LCD screen has been turned off. I forgot my password. • If you forget your user password, ask the system administrator to clear your user password. • If you forget your hard disk drive 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 administrator 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. 26