Manual

36
Chapter 6. Troubleshooting
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.
Display panel 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
F12 () 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 persists, follow the soluti
on in the
next problem “The screen is unreadable or
distorted.”
-Press F9 () 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.
•
Are the operating system or programs installed
correctly? If they are installed and configured
correctly, have the computer serviced.