Lenovo Z575 Laptop User Manual


 
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Chapter 5. Troubleshooting
The computer does not return
from sleep mode and the com-
puter does not work.
If the computer does not return from sleep mode, it may
have entered hibernation mode automatically because the
battery is depleted. Check the power indicator.
If your computer is in sleep mode, connect the AC adapter
to the computer, then press any key or the power button.
If your computer is in hibernation mode or power-off state,
connect the AC adapter to the computer, then press the
power button to resume operation.
Note:
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. If the computer is still not
reset, remove the AC adapter and the battery.
Computer screen 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 Fn + 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 persist, follow the solution in the following
problem “The screen is unreadable or distorted.”
- Press Fn + F2 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.
Did you install the operating system or programs correctly?
If they are installed and configured correctly, have the
computer serviced.