Keyboard Test Group - Dell Dimension XPS D Series Reference And Troubleshooting Manual

7-12 Dell Dimension XPS D xxx Systems Reference and Troubleshooting Guide
All of the tests, except the Video Memory Test and the Video Hardware Test, are
interactive. In the interactive tests, examine each displayed image.Type y if an image
is correct or type n if it is not.
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The Keyboard Test Group verifies the correct operation of your keyboard and the key-
board controller chip.
Keyboard problems are not always caused by the keyboard. For example, a complete
lockup of the computer system, which includes an inoperable keyboard, is probably
caused elsewhere. The configuration of a program can change the function of a key or
key combination. When a key does not work at all, run all the tests in the Keyboard
Test Group (described in Table 7-6).
NOTE: If the keyboard presented for the Key Sequence and Interactive tests does not
match your keyboard, press <Enter> twice to begin cycling through available key-
board maps. Press <Esc> to view the next map, and press <Enter> to accept the
map that matches your keyboard.
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Controller
Key Sequence
Interactive
Stuck Key
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The Mouse Test checks the functionality of the mouse controller and the operation of
the mouse buttons.
Mouse problems are as likely to originate in random-access memory (RAM) as they
are to be caused by a faulty mouse. Three sources of RAM-related problems include
the configuration of a program (which changes the function of the mouse), memory-
resident programs, and failure of a device driver (the software that controls the
function of the mouse). If you have eliminated these possibilities and the following
symptoms persist, run the Mouse Test:
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When you press a mouse button, the function of the button continues; that is,
the button seems to be stuck.
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Confirms that the keyboard controller chip can communicate
with the keyboard and checks the programming of the
controller chip.
Verifies that the keys on the keyboard function correctly
when you press the keys in a predefined order.
Checks the internal microcode of the keyboard and the
external interface of the keyboard controller chip for a
malfunctioning key.
Checks the internal microcode of the keyboard and the
external interface of the keyboard controller chip for a
repeating key signal.