Lenovo IdeaPad Z480 [40/59] Chapter 5 troubleshooting

Chapter 5. Troubleshooting

The computer does not return

from sleep mode and the com-

puter does not work.

• If the computer does not return from sleep mode, it may

have entered hibernation mode automatically because the

battery is depleted. Check the power indicator.

• If your computer is in sleep mode, connect the AC adapter

to the computer, then press any key or the power button.

• If your computer is in hibernation mode or power-off state,

connect the AC adapter to the computer, then press the

power button to resume operation.

Note:

If the system still does not return from sleep mode, your system has stopped responding, and

you cannot turn off the computer; reset the computer. Unsaved data may be lost. To reset the

computer, press and hold the

power button for 4 seconds or more. If the computer is still not

reset, remove the AC adapter and the battery.

Computer screen problems

The screen is blank. • Do the following:

- If you are using the AC adapter, or using the battery, and

the battery status indicator is on, press Fn + ↑ to make the

screen brighter.

- If the power indicator is in blinking, press the power

button to resume from the sleep mode.

- If the problem persist, follow the solution in the following

problem “The screen is unreadable or distorted.”

-Press Fn + F2 to confirm whether the LCD screen has been

turned off.

The screen is unreadable or

distorted.

• Make sure that:

- The display device driver is installed correctly.

- The screen resolution and color quality are correctly set.

- The monitor type is correct.

Incorrect characters appear on

the screen.

• Did you install the operating system or programs correctly?

If they are installed and configured correctly, have the

computer serviced.