Lenovo 10110/6267 [C540] Manuel D’Utilisation

21

User Guide

Problem: Ripple on screen.

Troubleshooting and problem resolution:
1.  Check to see if any of the following devices are located less than one meter 

from the computer: refrigerators, electric fans, electric dryers, UPS systems, 
regulators, fluorescent lamps or other computers that may be generating 
magnetic interference.

2.  Move any interfering devices away from the computer.
3.  If the problem persists, contact Lenovo Service.

Problem: No sound from the integrated speakers.

Troubleshooting and problem resolution:
•  Adjust the Windows volume control — select the speaker icon from the

Settings Charm or click the arrow on taskbar to show the hidden icons in 
Windows desktop mode, then click the speaker icon. Ensure that the volume 
is turned up and the sound is not muted. Adjust the volume, bass, or treble 
controls to eliminate distortion.

•  Reinstall the audio driver.
•  Disconnect any headphones from the headphone connector — sound from

the speakers is automatically disabled when headphones are connected to the 
computer’s side-panel headphone connector.

Problem: No sound from headphones.

Troubleshooting and problem resolution:
•  Check the headphone cable connection — ensure that the headphone cable is

securely inserted into the headphone connector.

•  Adjust the Windows volume control — select the speaker icon from the

Settings Charm or click the arrow on taskbar to show the hidden icons in 
Windows desktop mode, then click the speaker icon. Ensure that the volume is 
turned up and the sound is not muted.