Lenovo P585 Laptop User Guide - ideapad-P580,P585,N580,N581,N585,N586 - Page 35

Troubleshooting, Sleep problems, Computer screen problems

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Chapter 5. Troubleshooting Sleep problems The critical low-battery error • The battery power is getting low. Connect the AC adapter to message appears, and the the computer, or replace the battery with a fully charged computer immediately turns off. one. The computer enters sleep • Make sure that: mode immediately after Power- - The battery is charged. on self-test (POST). - The operating temperature is within the acceptable range. See "Chapter 2. Use and care Information" of Lenovo Safety and General Information Guide. Note: If the battery 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. • 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. If the computer is still not reset, remove the AC adapter and the battery. Computer screen problems The screen is blank. The screen is unreadable or distorted. Incorrect characters appear on the screen. • 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 persists, follow the solution in the following problem "The screen is unreadable or distorted." - Press Fn+F2 to confirm whether the backlight for the LCD screen has been turned off. • Make sure that: - The display device driver is installed correctly. - The screen resolution and color quality are correctly set. - The monitor type is correct. • Did you install the operating system or programs correctly? If they are installed and configured correctly, have the computer serviced. 31

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Chapter 5. Troubleshooting
31
Sleep problems
The critical low-battery error
message appears, and the
computer immediately turns off.
•
The battery power is getting low. Connect the AC adapter to
the computer, or replace the battery with a fully charged
one.
The computer enters sleep
mode immediately after Power-
on self-test (POST).
•
Make sure that:
-
The battery is charged.
-
The operating temperature is within the acceptable range.
See “Chapter 2. Use and care Information” of
Lenovo Safety
and General Information Guide
.
Note:
If the battery 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.
•
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. 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 persists, follow the solution in the
following problem “The screen is unreadable or
distorted.”
- Press
Fn+F2
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 on
the screen.
•
Did you install the operating system or programs correctly?
If they are installed and configured correctly, have the
computer serviced.