Lenovo 10099/2568 [B540] Manuel D’Utilisation

41

User Guide

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

Problem: The touch screen reacts, but not where you are touching it.

Troubleshooting and problem resolution:
Touch Screen Calibration:
1.  In Control Panel, select “Hardware and Sound”.
2.  In “Hardware and Sound” window, select “Tablet PC Settings”.
3.  In “Tablet PC Settings” dialogue, click “Calibrate” button.

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.