Dell PowerEdge 6350 Installation And Troubleshooting Manual

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Contents

Dell PowerEdge 6350 Installation And Troubleshooting Manual Manual pdf 68 page image

5-18 Dell PowerEdge 6350 Systems Installation and Troubleshooting Guide.H\ERDUG7HVW*URXSThe subtests in the Keyboard Test group verify the correct operation of the keyboardand the keyboard controller chip.6XEWHVWVThe five keyboard subtests and the keyboard functions they test follow:á Keyboard Controller TestConfirms the ability of the keyboard controller chip to communicate with the key-board and the programming of the controller chipá Keyboard Key Sequence TestVerifies that the keys on the keyboard function correctly when you press the keysin a predefined orderá Keyboard Interactive TestChecks the internal microcode of the keyboard and the external interface of thekeyboard controller chip for a malfunctioning keyá Stuck Key TestChecks the internal microcode of the keyboard and the external interface of thekeyboard controller chip for a repeating-key signalá External Key Pad TestChecks the contact beneath each key for an electrical impulse to ensure that eachkey is working properly:K\5XQD.H\ERDUG7HVW"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 likelynot 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 orkey combination. Likewise, key configuration programs can change a key’s function.Because these programs are memory resident, you should be sure to clear them outof 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:á When you press a key, the character represented by that key appears repeatedly;the key seems to be stuck. Run the Stuck Key Test.á When you press a key and the response is different from the usual response orthe response you anticipated, the key contact may be damaged. Run the Key-board Interactive Test.á When a key does not work at all, run all of the subtests in the Keyboard Testgroup.