Lenovo Flex 3 User Manual

							Chapter 4. Troubleshooting
37
Troubleshooting  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
Display problems
When I turn on the 
computer, nothing appears 
on the screen.•If the screen is blank, make sure that:
- The AC power adapter is connected to the 
computer, and the power cord is plugged into a 
working electrical outlet.
- The computer power is on. Press the Power button 
again for confirmation.
•If these items are set correctly, and the screen remains 
blank, have the computer serviced. 
When I turn on the 
computer, only a white 
cursor appears on a blank 
screen. •Restore backed-up files to your Windows 
environment or the entire contents of your hard disk 
to its original factory contents using the Lenovo 
OneKey Recovery system. If you still see only the 
cursor on the screen, have the computer serviced.
The screen goes blank 
while the computer is on.•Your power management is enabled. Do one of the 
following to resume from sleep mode:
- Press any key on the keyboard. (Notebook mode 
only) 
- Press the Power button.
-Press F9 ( ) to confirm whether the backlight of 
the LCD screen has been turned off.
Sleep problems
The critical low-battery error 
message appears, and the 
computer immediately turns 
off.•The battery power is getting low. Connect the AC 
power adapter to the computer.
The computer enters sleep 
mode immediately after 
Power-on.•Make sure that:
-The battery is charged.
- The operating temperature is within the acceptable 
range. See “Chapter 2. Use and care Information” in 
the Lenovo Safety and General Information Guide.
Note:If the battery is charged and the temperature is within range, have the computer 
serviced. 
						

							Chapter 4. Troubleshooting
38
The computer does not 
return from sleep mode and 
the computer does not 
work. •If your computer is in sleep mode, connect the AC 
power adapter to the computer, then press the 
Windows button 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 eight seconds or more. If 
the computer still does not reset, remove 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.
-Press F9 ( ) to confirm whether the backlight of 
the LCD screen has been turned off.
- If the problem persists, follow the solution in the 
next problem “The screen is unreadable or 
distorted.”
The screen is unreadable or 
distorted.•Make sure that: 
- The screen resolution and color quality are correctly 
set. 
- The monitor type is correct.
Incorrect characters appear 
on the screen.•Is the operating system or programs installed 
correctly? If they are installed and configured 
correctly, have the computer serviced.
Sound problems
No sound can be heard 
from the speakers even 
when the volume is turned 
up.•Make sure that:
- The Mute function is off.
- The combo audio jack is not being used.
- Speakers are selected as the playback device.  
						

							Chapter 4. Troubleshooting
39
Battery problems
Your computer shuts down 
before the battery status 
indicator shows empty.
-or-
Your computer operates 
after the battery status 
indicator shows empty.•Recharge the battery.
Other problems
Your computer does not 
respond.•To turn off your computer, press and hold the Power 
button for eight seconds or more. If the computer still 
does not respond, remove the AC power adapter.
•Your computer might lock when it enters sleep mode 
during a communication operation. Disable the sleep 
timer when you are working on the network.
The connected external 
device does not work. •Do not connect or disconnect any external device 
cables other than USB while the computer power is 
on. Otherwise, you might damage your computer.
•When using high power consumption external 
devices, such as an external USB optical disk drive, 
use an external device power adapter. Otherwise, the 
device may not be recognized, or the system may 
shut down as a result. 
						

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Trademarks
The following terms are trademarks or registered trademarks of Lenovo in the 
United States, other countries, or both.
Lenovo
OneKey
Microsoft and Windows are trademarks of Microsoft Corporation in the United 
States, other countries, or both.
Other company, products, or service names may be trademarks or service marks 
of others. 
						

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en-US
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©Lenovo China 2015