Dell PowerEdge 6350, Инструкция по установке и устранению неисправностей

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5-18 Dell PowerEdge 6350 Systems Installation and Troubleshooting Guide
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The subtests in the Keyboard Test group verify the correct operation of the keyboard
and the keyboard controller chip.
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The five keyboard subtests and the keyboard functions they test follow:
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Keyboard Controller Test
Confirms the ability of the keyboard controller chip to communicate with the key-
board and the programming of the controller chip
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Keyboard Key Sequence Test
Verifies that the keys on the keyboard function correctly when you press the keys
in a predefined order
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Keyboard Interactive Test
Checks the internal microcode of the keyboard and the external interface of the
keyboard controller chip for a malfunctioning key
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Stuck Key Test
Checks the internal microcode of the keyboard and the external interface of the
keyboard controller chip for a repeating-key signal
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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:
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When you press a key, the character represented by that key appears repeatedly;
the key seems to be stuck. Run the Stuck Key Test.
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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.
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When a key does not work at all, run all of the subtests in the Keyboard Test
group.