Lenovo ThinkCentre 3379 User Manual page 66

Symptom
The keyboard does not work.
The computer does not respond
to the keyboard.
The USB Keyboard does not
work.
The mouse does not work. The
computer does not respond to
the mouse.
The operating system will not
start.
The SMC login prompt
disappears before you log on
and then a black screen displays
(for SMC computers only).
The computer beeps multiple
times before the operating
system starts.
58
User Guide
Action
Verify that:
v The computer is turned on.
v The monitor is 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. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
Verify that:
v The computer is turned on.
v The keyboard is securely connected to a USB connector on the front or rear of
the computer.
v No keys are stuck.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
Verify that:
v The computer is turned on.
v The mouse is securely connected to the mouse connector on the computer.
v The mouse is clean. Refer to "Cleaning the mouse" on page 61 for further
information.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
Verify that:
v There is no diskette in the diskette drive.
v The startup sequence includes the device where the operating system resides.
Usually, the operating system is on the hard disk drive. For more information,
see "Selecting a startup device" on page 51.
Note: For SMC computers, you might receive the error message "No operating
system found. Press F1 to repeat boot sequence." In this case, press
Ctrl+Alt+Delete instead of F1 to establish a connection to the storage area
network where your operating system is stored. Verify that the user name is not
logged on in another location.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
Contact your administrator.
Verify that no keys are stuck down.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.