Service manual

Running the Dell Diagnostics: Dell Latitude CP
Subtests
The four subtests in the Keyboard test group confirm the following keyboard functions:
● Keyboard Controller Test
Confirms the ability of the keyboard controller chip to communicate with the keyboard
and confirms the programming of the controller chip
● Keyboard Key Sequence Test
Verifies that the keys on the keyboard function correctly when you press them in a
predefined order
● Keyboard Interactive Test
Checks the internal microcode of the keyboard and the external interface of the
keyboard controller chip for a malfunctioning key
● Stuck Key Test
Checks the internal microcode of the keyboard and the external interface of the
keyboard controller chip for a repeating key signal
Mouse Test
The Mouse test checks the functionality of the mouse controller (which affects the ability to
move the touch pad/mouse pointer around the screen with its corresponding movement on
your desk or pad) and the operation of the touch pad/mouse buttons.
Why Run the Mouse Test?
Touch pad or mouse problems are as likely to be caused in RAM as they are to be caused by
a faulty touch pad or mouse. Three sources of problems include the configuration of a program
(which changes the function of the touch pad or mouse), memory-resident programs like
Sidekick or ProKey, and failure of a device driver (the software that controls the functions of a
touch pad or mouse). If these possibilities have been eliminated and the following symptoms
persist, run the Mouse test:
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