Lenovo Y50-70 Guide de l'utilisateur télécharger pdf (Page 34)

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 power

adapter to the computer.

The computer enters sleep

mode immediately after Power-

on self-test (POST).

• Make sure that:

-The battery pack is charged.

-The operating temperature i s within the acceptable range.

See “Chapter 2. Use and care Information” in the Lenovo

Safety and General Information Guide.

Note: If the battery pack 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 power

adapter to the computer, then press any key or the Power

button.

• If the system still does not return from sleep mode, stops

responding, or cannot be tu

rned off, reset the computer.

Unsaved data may be lost. To reset the computer, press and

hold the Power button for four seconds or more. If the

computer is still not reset, remove the AC power adapter.

Display panel problems

The screen is blank. • Do the following:

-If you are using the AC power adapter or the battery pack,

and the battery status indicator is on, press Fn +

make the screen brighter.

-If the power indicator is blinking, press the Power button

to resume from sleep mode.

-If the problem persists, follow the solution in the next

problem “The screen is unreadable or distorted.”

-Press Fn + F2 to confirm whether the backlight of 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.

• Is the operating system or programs installed correctly?

If they are installed and configured correctly, have the

computer serviced.

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Lenovo Y50-70 Guide de l'utilisateur Page 34

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