Lenovo 59387520 manual Display panel problems, Work

Chapter 4. Troubleshooting

The computer does not	• If your computer is in sleep mode, connect the AC
return from sleep mode,	power adapter to the computer and then press any
and the computer does not	key or the power button.
work.	• 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 4
	seconds or more. If the computer is still not reset,
	remove the battery pack and 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, and the battery status indicator is on, press
	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.”
	- Press F9 (		) 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	• Are the operating system or programs installed
on the screen.	correctly? If they are installed and configured
	correctly, have the computer serviced.

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