Troubleshooting - Lenovo YOGA 720-15IKB User Manual

Chapter 4. Troubleshooting

Troubleshooting

Display problems
When I turn on the
computer, nothing
appears on the screen.
When I turn on the
computer, only a white
cursor appears on a blank
screen.
The screen goes blank
while the computer is on.
Sleep problems
The critical low-battery
error message appears,
and the computer
immediately turns off.
The computer enters sleep
mode immediately after
Power-on self-test (POST).
Note: If the battery pack 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.
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• If the screen is blank, make sure that:
- The AC power adapter is connected to the computer, and
plugged into a working electrical outlet.
- The computer power is on. Press the Power button again for
confirmation.
• If these items are properly set, and the screen remains blank,
have the computer serviced.
• Restore backed-up files to your Windows environment or the
entire contents of your hard disk to its original factory contents
using the Reset this PC. If you still see only the cursor on the
screen, have the computer serviced.
• Your screen saver or power management may be enabled. Do
one of the following to resume from sleep mode:
- Press any key on the keyboard. (Notebook mode only)
- Press the Power button.
• The battery power is getting low. Connect the AC power
adapter to the computer.
• Make sure that:
- The battery pack 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.
• If your computer is in sleep mode, connect the AC power
adapter to the computer, then press the Power button.
• If the system still does not return from sleep mode, stops
responding, or cannot be turned off, 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 is still not reset, remove the AC power adapter.
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