Lenovo Y520 Panduan Pengguna - Halaman 24

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Chapter 4. Troubleshooting

Sleep problems

The critical low-battery

error message appears,

and the computer

immediately turns off.

The computer enters sleep

mode immediately after

Power-on self-test (POST).

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.

Display panel problems

The screen is blank.

The screen is unreadable

or distorted.

Incorrect characters

appear on the screen.

• The battery power is getting low. Connect the AC power

adapter to the computer.

• Make sure that:

- The battery pack is charged.

- The operating temperature is within the acceptable range.

See "Chapter 2. Use and care Information" in the Lenovo

Safety and General Information Guide.

• 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 turned 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.

• Do the following:

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

and the battery status indicator is on, press Fn + F12 to

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."

• Make sure that:

- The display device driver is installed correctly.

- The screen resolution and color quality are correctly set.

- The monitor type is correct.

• Is the operating system or programs installed correctly? If

they are installed and configured correctly, have the

computer serviced.