Dell PowerEdge 4200 Installation And Troubleshooting Manual

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Contents

Dell PowerEdge 4200 Installation And Troubleshooting Manual Manual pdf 52 page image

5-14 Dell PowerEdge 4200 Systems Installation and Troubleshooting Guide• Keyboard Key Sequence TestVerifies that the keys on the keyboard function cor-rectly when you press the keys in a predefined order• Keyboard Interactive TestChecks the internal microcode of the keyboard andthe external interface of the keyboard controller chipfor a malfunctioning key• Stuck Key TestChecks the internal microcode of the keyboard andthe external interface of the keyboard controller chipfor a repeating-key signal• External Key Pad TestChecks the contact beneath each key for an electricalimpulse to ensure that each key is working properlyWhy Run a Keyboard Test?Keyboard problems are not always caused by thekeyboard. For example, a complete lockup of the com-puter system, rendering the keyboard inoperable, is morelikely caused elsewhere. There are three symptoms thatare likely to be keyboard-related. Sometimes, the config-uration of a program changes the function of a key or keycombination. Likewise, key configuration programs canchange a key’s function. Because these programs arememory resident, you should be sure to clear them out ofthe computer’s memory before running a subtest in theKeyboard Test Group. (Clear them from memory byrebooting the computer from the Dell Server AssistantCD.) When these possibilities have been eliminated, andif the following symptoms occur, you should run one ormore of the subtests in the Keyboard Test Group:• When you press a key, the character represented bythat key appears repeatedly; the key seems to bestuck. Run the Stuck Key Test.• When you press a key and the response is differentfrom the usual response or the response you antici-pated, the key contact may be damaged. Run theKeyboard Interactive Test.• When a key does not work at all, run all of the sub-tests in the Keyboard Test Group.Mouse TestThe Mouse Test checks the functionality of the mousecontroller (which coordinates cursor movement on thescreen with corresponding movement of the mouse ortouch pad) and the operation of the mouse keys/touchpad.SubtestsThere are no subtests for the Mouse Test Group.Why Run the Mouse Test?Mouse or touch pad problems are as likely to originate inRAM as they are to be caused by a faulty mouse or touchpad. Three sources of RAM-related problems include theconfiguration of a program (which changes the functionof the mouse or touch pad), memory-resident programs,and failure of a device driver (the software that controlsthe function of the mouse or touch pad). If these possibil-ities have been eliminated and the following symptomspersist, run the Mouse Test:• When you press a mouse button or the touch pad, thefunction of the button (or touch pad) continues; thatis, the button (or touch pad) seems to be stuck.• When you press a mouse button or the touch pad, theresponse is different from the usual or anticipatedresponse, which indicates the button (or touch pad)contact may be damaged.• A mouse button or the touch pad does not work at all.• The cursor does not respond on the screen in accor-dance with the movements you make with the mouseor touch pad.Diskette Drives Test GroupThe subtests in the Diskette Drives Test Group allow youto test both 5.25-inch and 3.5-inch diskette drives of allcapacities.