Troubleshooting Touch Screen; Troubleshooting Audio Problems; Troubleshooting Software Problems - Lenovo IdeaCentre A720 User Manual

4.2 Troubleshooting Touch screen

Problem: The touch screen reacts, but not where you are touching it.
Troubleshooting and problem resolution:
Touch Screen Calibration:
1. In Windows 7, Select "Start" – "Control Panel".
2. In Control Panel, select "Hardware and Sound".
3. In "Hardware and Sound" window, select "Tablet PC Settings".
4. In "Tablet PC Settings" dialogue, click "Calibrate" button.

4.3 Troubleshooting Audio Problems

Problem: No sound from the integrated speakers.
Troubleshooting and problem resolution:
• Adjust the Windows volume control — double-click the speaker icon in the
lower-right corner of your screen. 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 — click or double-click the speaker icon in
the lower-right corner of your screen. Ensure that the volume is turned up and
the sound is not muted.

4.4 Troubleshooting Software Problems

Problem: You are unable to exit a running program normally.
Troubleshooting and problem resolution:
1. Open the Task Manager window by pressing Ctrl, Alt and Delete at the same
time.
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