Dell PowerEdge 4350 Dell PowerEdge 4350 Systems Installation and Troubleshooti - Page 66

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Match case Limit results 1 per page

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5-18

Dell PowerEdge

4350 Systems Installation and Troubleshooting Guide

²

Keyboard Key Sequence Test

Verifies that the keys on the keyboard function correctly when you press the keys

in a predefined order

²

Keyboard Interactive Test

Checks the internal microcode of the keyboard and the external interface of the

keyboard controller chip for a malfunctioning key

²

Stuck Key Test

Checks the internal microcode of the keyboard and the external interface of the

keyboard controller chip for a repeating-key signal

²

External Key Pad Test

Checks the contact beneath each key for an electrical impulse to ensure that each

key is working properly

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Keyboard problems are not always caused by the keyboard. For example, if the com-

puter system locks up, rendering the keyboard inoperable, the problem is most likely

not caused by the keyboard. There are three symptoms that are likely to be keyboard-

related. Sometimes, the configuration of a program changes the function of a key or

key combination. Likewise, key configuration programs can change a key±s function.

Because these programs are memory-resident, you should be sure to clear them out

of the computer±s memory before running a subtest in the Keyboard test group. (Clear

them from memory by rebooting the computer from the diagnostics diskette.) When

these possibilities have been eliminated, and if the following symptoms occur, you

should run one or more of the subtests in the Keyboard test group:

²

When you press a key, the character represented by that key appears repeatedly;

the key seems to be stuck. Run the Stuck Key Test.

²

When you press a key and the response is different from the usual response or

the response you anticipated, the key contact may be damaged. Run the Key-

board Interactive Test.

²

When a key does not work at all, run all of the subtests in the Keyboard test

group.

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The Mouse test checks the functionality of the mouse controller (which coordinates

cursor movement on the screen with corresponding movement of the mouse or

touch pad) and the operation of the mouse keys/touch pad.

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There are no subtests for the Mouse test group.