Lenovo 80VV002SUK Посібник користувача - Сторінка 38

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Chapter 4. Troubleshooting
The computer does not
return from sleep mode
and the computer does
not work.
Note: If the system still does not return from sleep mode, your system has stopped responding, and you
cannot turn off the computer; force shut down the computer (Unsaved data may be lost). To force shut
down the computer, press and hold the Power button for about ten seconds or more.
Display panel problems
The screen is blank.
The screen is unreadable
or distorted.
Incorrect characters
appear on the screen.
Sound problems
No sound can be heard
from the speakers even
when the volume is turned
up.
• If the computer does not return from sleep mode, it might be
because the battery is depleted.
• If your computer is in sleep mode, connect the AC power
adapter to the computer. Then press the Power button.
• If your computer is powered-off, connect the AC power
adapter to the computer. Then press the Power button to
resume operation.
• Do the following:
- If you are using the AC power adapter or the battery, press
F12 (located on the keyboard) to make the screen brighter.
- Press the Power button to confirm if the computer is in
sleep mode.
- If the problem persists, follow the solution in the next
problem "The screen is unreadable or distorted."
• Make sure that the screen resolution and color quality are
correctly set.
• Is the operating system or programs installed correctly?
If they are installed and configured correctly, do the
following:
a Press the Power button for about two seconds to turn on
the computer.
b Press and hold the Power button for about ten seconds to
force shut down.
c Press the Power button for about two seconds again to
restart. Then reset the computer with the Reset this PC
recovery system.
If the problem persists, have the computer serviced.
• Make sure that:
- The Mute function is off.
- The combo audio jack is not being used.
- Speakers are selected as the playback device.
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