Lenovo IdeaPad Y480 Bedienungsanleitung PDF herunterladen (Seite 30)

Chapter 4. Troubleshooting

Sleep problems

The critical low-battery error

message appears, and the

computer immediately turns off.

• The battery power is getting low. Connect the AC 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” of Lenovo Safety and General

Information Guide.

Note: If the battery is charged and the temperature is within 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 adapter to the

computer, then press any key or the power button.

• 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 backlight for 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.

Sound problems

No sound can be heard from the

speaker even when the volume is

turned up.

• Make sure that:

- The Mute function is off.

- The headphone jack is not used.

- Speakers are selected as the playback device.

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