Dell Precision 330 User's Guide - Page 131

• Ensure that the cable is firmly connected to the computer. • If you are using a USB keyboard, ensure that you connect to one of the Port 1 USB connectors on the system back panel (see "Back-Panel Connectors and Indicators"). • If you are using a PS/2 keyboard that can be configured with various switch settings, ensure that the switch is set to PS/2, Enhanced XT/AT, or PC/AT. The switch settings are usually on the bottom of the keyboard, sometimes behind a panel. Refer to the documentation that came with the keyboard for more information. • Check for interference. Keyboard extension cables can cause problems. • Restart the computer. If the problem still exists after you complete the basic checks, fill out the Diagnostics Checklist as you perform the following steps: 1 Turn off the computer, wait 30 seconds, and turn it on again. During the boot routine, do the Num Lock, Caps Lock, and Scroll Lock lights on the keyboard blink momentarily? Yes. Go to step 2. No. Go to step 3. 2 Use the keyboard to type some characters. Do the characters appear on the screen? Yes. The problem is resolved. No. Contact Dell for technical assistance. 3 Run the PC-AT Compatible Keyboards tests in the Dell Diagnostics. Did any of the diagnostics tests fail? Yes. The original keyboard may be defective. Go to step 4. No. Go to the next question. Do you have another computer that is working properly? Yes. Go to step 4. No. Go to the next question. Do you have another keyboard that is working properly? S o lv ing Pr o ble m s 131