Lenovo C3/C4/C5 Series User Guide
Table Of Contents
- Important Safety Information
- Using the Computer Hardware
- Using Windows 8.1
- Touch screen instructions
- Using the Rescue System
- Using the Software
- Troubleshooting and Confirming Setup
- Troubleshooting Display Problems
- Troubleshooting Touch screen
- Troubleshooting Audio Problems
- Troubleshooting Software Problems
- Troubleshooting Problems with Optical Drives and Hard Disks
- Special considerations for troubleshooting Windows
- Windows Help and Support
- BIOS setup utility
- Performing Daily Maintenance Tasks
- Hardware Replacement Guide
- Appendix.
31
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.
Troubleshooting Touch screen
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.
Troubleshooting Audio Problems
Problem: No sound from the integrated speakers.
Troubleshooting and problem resolution:
• AdjusttheWindowsvolumecontrol—selectthespeakericonfromthe
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.
• Reinstalltheaudiodriver.
• Disconnectanyheadphonesfromtheheadphoneconnector—soundfrom
the speakers is automatically disabled when headphones are connected to the
computer’s side-panel headphone connector.