Dell Latitude D531 User Manual

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Contents

88 TroubleshootingFill out the Diagnostics Checklist (see "Diagnostics Checklist" on page 137) as you perform the variouschecks.NOTE: Use the integrated keyboard when running the Dell Diagnostics or the system setup program. When youattach an external keyboard, the integrated keyboard remains fully functional.External keyboard problemsNOTE: When you attach an external keyboard, the integrated keyboard remains fully functional.CH E C K T H E K E Y B O A R D C A B L E — Shut down the computer. Disconnect the keyboard cable and check it fordamage, and firmly reconnect the cable.If you are using a keyboard extension cable, disconnect it and connect the keyboard directly to thecomputer.CH E C K T H E E X T E R N A L K E Y B O A R D1 Shut down the computer, wait 1 minute, and turn it on again.2 Verify that the numbers, capitals, and scroll lock lights on the keyboard blink during the boot routine.3 From the Windows desktop, click Start→ All Programs→ Accessories→ Notepad.4 Type some characters on the external keyboard and verify that they appear on the display.If you cannot verify these steps, you may have a defective external keyboard.TO V E R I F Y T H A T T H E P R O B L E M I S W I T H T H E E X T E R N A L K E Y B O A R D , C H E C K T H E I N T E G R A T E D K E Y B O A R D1 Shut down the computer.2 Disconnect the external keyboard.3 Turn on the computer.4 From the Windows desktop, click Start→ All Programs→ Accessories→ Notepad.5 Type some characters on the internal keyboard and verify that they appear on the display.If the characters appear now but did not with the external keyboard, you may have a defective externalkeyboard. Contact Dell (see "Contacting Dell" on page 137).RU N T H E K E Y B O A R D D I A G N O S T I C S T E S T S — Run the PC-AT Compatible Keyboards tests in the Dell Diagnostics(see "Dell Diagnostics" on page 77). If the tests indicate a defective external keyboard, contact Dell (see "ContactingDell" on page 137).Unexpected charactersDI S A B L E T H E N U M E R I C K E Y P A D — Press to disable the numeric keypad if numbers are displayedinstead of letters. Verify that the numbers lock light is not lit.Lockups and Software ProblemsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.