Dell Latitude D820 Technical Manual

Also see for D820 - Latitude Laptop Notebook: Quick reference guide Quick reference guide Quick reference guide Quick reference guide Service manual

Contents

Ensure that the IEEE 1394 device is properly inserted into the connectorKeyboard ProblemsCAUTION: Before you begin any of the procedures in this section, follow the safetyinstructions in the Product Information Guide.Fill out the Diagnostics Checklist (see Diagnostics Checklist) as you perform the various checks.NOTE: Use the integrated keyboard when running the Dell Diagnostics or the system setupprogram. When you attach an external keyboard, the integrated keyboard remains fully functional.External Keyboard problemsNOTE: When you attach an external keyboard, the integrated keyboard remains fully functional.Check the keyboard cable — 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.Check the external keyboard —1. 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 bootroutine.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 verify that the problem is with the external keyboard, check the integrated keyboard —1. 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).Run the keyboard diagnostics tests — Run the PC-AT Compatible Keyboards tests in the DellDiagnostics (see Dell Diagnostics). If the tests indicate a defective external keyboard, contact Dell(see Contacting Dell).