Lenovo 7637, 6139, 7348, 8338, 8820, 7479, 7626, 7356, 7359 Symptom, Action, The keyboard does not work

Symptom	Action
The keyboard does not work.	Verify that:
The computer does not respond	v The computer is turned on.
to the keyboard.	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.
The USB Keyboard does not	Verify that:
work.	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.
The mouse does not work. The	Verify that:
computer does not respond to	v The computer is turned on.
the mouse.	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 54 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.
The operating system will not	Verify that:
start.	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 45.
	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.
The SMC login prompt	Contact your administrator.
disappears before you log on
and then a black screen displays
(for SMC computers only).
The computer beeps multiple	Verify that no keys are stuck down.
times before the operating	If you cannot correct the problem, have the computer serviced. Refer to the
system starts.
	safety and warranty information that is provided with your computer for a list of
	service and support telephone numbers.

52User Guide