Lenovo ThinkCentre M91p (English) User Guide - Page 113

Intermittent problems, Keyboard, mouse, or pointing device problems

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• Ensure that video resolution is set to less than 1152 x 864. If these actions do not correct the problem, run the diagnostic programs (see "Diagnostic programs" on page 111 for instructions). If you need technical assistance, see Chapter 11 "Getting information, help, and service" on page 113. Invalid disc or no disc found message Symptom: Invalid disc or no disc found message Actions: • Ensure that a DVD disc is in the drive with the shiny side of the disc facing down. • Ensure that video resolution is set to less than 1152 x 864. • On computers that have a CD-ROM or CD-RW drive in addition to a DVD-ROM drive, make sure that the DVD disc is in the drive labeled "DVD". If these actions do not correct the problem, run the diagnostic programs (see "Diagnostic programs" on page 111 for instructions). If you need technical assistance, see Chapter 11 "Getting information, help, and service" on page 113. 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 these actions do not correct the problem, run the diagnostic programs (see "Diagnostic programs" on page 111 for instructions). If you need technical assistance, see Chapter 11 "Getting information, help, and service" on page 113. 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 99 • "The mouse or pointing device does not work" on page 100 • "The pointer on the screen does not move smoothly with the mouse" on page 100 • "The fingerprint reader does not work" on page 100 • "The wireless keyboard does not work" on page 101 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. Chapter 10. Troubleshooting and diagnostics 99

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•
Ensure that video resolution is set to less than 1152 x 864.
If these actions do not correct the problem, run the diagnostic programs (see “Diagnostic programs” on
page 111 for instructions). If you need technical assistance, see Chapter 11 “Getting information, help, and
service” on page 113.
Invalid disc or no disc found message
Symptom: Invalid disc or no disc found message
Actions:
•
Ensure that a DVD disc is in the drive with the shiny side of the disc facing down.
•
Ensure that video resolution is set to less than 1152 x 864.
•
On computers that have a CD-ROM or CD-RW drive in addition to a DVD-ROM drive, make sure that the
DVD disc is in the drive labeled “DVD”.
If these actions do not correct the problem, run the diagnostic programs (see “Diagnostic programs” on
page 111 for instructions). If you need technical assistance, see Chapter 11 “Getting information, help, and
service” on page 113.
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 these actions do not correct the problem, run the diagnostic programs (see “Diagnostic programs” on
page 111 for instructions). If you need technical assistance, see Chapter 11 “Getting information, help, and
service” on page 113.
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 99
•
“The mouse or pointing device does not work” on page 100
•
“The pointer on the screen does not move smoothly with the mouse” on page 100
•
“The fingerprint reader does not work” on page 100
•
“The wireless keyboard does not work” on page 101
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.
Chapter 10
.
Troubleshooting and diagnostics
99