Lenovo Z40-75 User Manual download pdf (Page 31)

Chapter 4. Troubleshooting

Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Display problems

When I turn on the computer,

nothing appears on the screen.

• If the screen is blank, make sure that:

-The battery pack is installed correctly.

- 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.)

- The memory is installed correctly.

• 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 t

he screen, have the computer

serviced.

The screen goes blank while

the computer is on.

• Your screen saver or power management may be enabled.

Do one of the following to exit from the screen saver or to

resume from sleep mode:

-Touch the tou chpad.

-Press any key on the keyboard.

-Press the Power button.

-Press F9 ( ) to confirm whether the backlight of the

LCD screen has been turned off.

BIOS password problems

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 t

he 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 w

ill be

charged for parts and service.

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Lenovo Z40-75 User Manual Page 31

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