Lenovo NetVista A20 (English) Quick Reference - Page 24

Error codes, Symptom, Action

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Symptom The keyboard does not work (no keys are working). Action Verify that: v The computer and monitor are turned on and the brightness and contrast controls are set correctly. v The keyboard is securely connected to the keyboard connector on the computer. v No keys are stuck. The mouse does not work. If you cannot correct the problem, have the computer serviced. Verify that: v The computer and monitor are turned on and the brightness and contrast are set correctly. v The mouse is securely connected to the mouse connector on the computer. The operating system will not start. If you cannot correct the problem, have the computer serviced. Verify that: v There is no diskette in the diskette drive. v The boot sequence includes the boot device (the device where the operating system resides). In most cases, the operating system is on the hard disk. Start the BIOS Setup Utility program and verify the boot sequence. If you cannot correct the problem, have the computer serviced. An error code is displayed before the operating system starts. See "Error codes" The computer beeps Verify that no keys are stuck down. multiple times before the operating system starts. If you cannot correct the problem, have the computer serviced. Error codes The following table includes some of the error codes that might display when you turn on the computer. v Record any error codes that are displayed. If you call for service, you will be asked for the error codes. v If you get multiple error codes, always work in the order in which the error codes are displayed. v If the error code is not in the following table, more in-depth troubleshooting is required. 10 Quick Reference

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Symptom
Action
The keyboard does not
work (no keys are
working).
Verify that:
v
The computer and monitor are turned on and the
brightness and contrast controls are set correctly.
v
The keyboard is securely connected to the keyboard
connector on the computer.
v
No keys are stuck.
If you cannot correct the problem, have the computer
serviced.
The mouse does not
work.
Verify that:
v
The computer and monitor are turned on and the
brightness and contrast are set correctly.
v
The mouse is securely connected to the mouse connector
on the computer.
If you cannot correct the problem, have the computer
serviced.
The operating system
will not start.
Verify that:
v
There is no diskette in the diskette drive.
v
The boot sequence includes the boot device (the device
where the operating system resides). In most cases, the
operating system is on the hard disk. Start the BIOS Setup
Utility program and verify the boot sequence.
If you cannot correct the problem, have the computer
serviced.
An error code is
displayed before the
operating system starts.
See
“
Error codes
”
The computer beeps
multiple times before the
operating system starts.
Verify that no keys are stuck down.
If you cannot correct the problem, have the computer
serviced.
Error codes
The following table includes some of the error codes that might display when
you turn on the computer.
v
Record any error codes that are displayed. If you call for service, you will be
asked for the error codes.
v
If you get multiple error codes, always work in the order in which the error
codes are displayed.
v
If the error code is not in the following table, more in-depth troubleshooting
is required.
10
Quick Reference