Intermittent Problems; Keyboard, Mouse, Or Pointing Device Problems - Lenovo ThinkCentre M32 Hardware Maintenance Manual

Sound comes from one external speaker only
Symptom: Sound comes from one external speaker only.
Actions:
• Ensure that the speaker cable is inserted completely into the connector on the computer.
• Ensure that the cable that attaches the left speaker to the right speaker is securely connected.
• Double-click the speaker icon in the Windows notification area. A master volume-control window opens.
Verify that the Balance settings are set correctly.
If these actions do not correct the problem, you might have a failing speaker. Have the speaker serviced. If
you need technical assistance, see "Lenovo Support Web site" on page 29.
No audio in DOS applications or games
Symptom: No audio in DOS applications or games
Actions:
• Ensure that the DOS application or game is configured to use SoundBlaster Pro or SoundBlaster
emulation. Refer to the documentation that comes with the application or game for instructions on
setting sound-card settings.
• If you need technical assistance, see "Lenovo Support Web site" on page 29.

Intermittent problems

Symptom: A problem occurs only occasionally and is difficult to repeat.
Actions:
• Verify that all cables and cords are securely connected to the computer and attached devices.
• Verify that when the computer is on, the fan grill is not blocked (there is air flow around the grill), and the
fans are working. If airflow is blocked or the fans are not working, the computer might overheat.
• If SCSI devices are installed, verify that the last external device in each SCSI chain is terminated correctly.
(See your SCSI documentation.)
If you need technical assistance, see "Lenovo Support Web site" on page 29.

Keyboard, mouse, or pointing device problems

Select your symptom from the following list:
• "All or some keys on the keyboard do not work" on page 36
• "The mouse or pointing device does not work" on page 37
• "The pointer on the screen does not move smoothly with the mouse" on page 37
• "The wireless keyboard does not work" on page 38
All or some keys on the keyboard do not work
Symptom: All or some keys on the keyboard do not work.
Actions:
• Verify that the keyboard cable is securely connected to the correct connector on the computer.
• If you are using an Enhanced Performance USB keyboard and one or more of the Rapid Access buttons
are the only keys that are not working, these buttons might have been disabled or have not been assigned
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ThinkCentre M32 Hardware Maintenance Manual