Lenovo 77274HU, Руководство пользователя, Страница: 32 / 35

27
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.
4.2 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.
4.3 Troubleshooting Software Problems
Problem: You are unable 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.
2. Select the Application tab, select the problem program, then click the End
Task
button.