HP dc73 Service Reference Guide - HP Compaq dc7800 Business PC - Page 249
Solving Hardware Installation Problems, Solving Mouse Problems, Solving Keyboard Problems continued
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Table D-9 Solving Keyboard Problems (continued) Cursor will not move using the arrow keys on the keypad. Cause Solution The Num Lock key may be on. Press the Num Lock key. The Num Lock light should not be on if you want to use the arrow keys. The Num Lock key can be disabled (or enabled) in Computer Setup. Table D-10 Solving Mouse Problems Mouse does not respond to movement or is too slow. Cause Solution Mouse connector is not properly plugged into the back of the computer. Shut down the computer using the keyboard. 1. Press the Ctrl and Esc keys at the same time (or press the Windows logo key) to display the Start menu. 2. Use the arrow keys to select Shut Down and then press the Enter key. 3. After the shutdown is complete, plug the mouse connector into the back of the computer (or the keyboard) and restart. Program in use has stopped responding to commands. Shut down the computer using the keyboard then restart the computer. Mouse may need cleaning. Remove the roller ball cover on the mouse and clean the internal components. Mouse may need repair. See the Worldwide Limited Warranty for terms and conditions. Wireless device error. 1. Check the software, if available, for device status. 2. Check/replace device batteries. 3. Reset receiver and mouse. Computer is in standby mode. Press the power button to resume from standby mode. CAUTION: When attempting to resume from standby mode, do not hold down the power button for more than four seconds. Otherwise, the computer will shut down and you will lose any unsaved data. Mouse will only move vertically, horizontally, or movement is jerky. Cause Solution Mouse roller ball or the rotating encoder shafts that make contact with the ball are dirty. Remove roller ball cover from the bottom of the mouse and clean the internal components with a mouse cleaning kit available from most computer stores. Solving Hardware Installation Problems You may need to reconfigure the computer when you add or remove hardware, such as an additional drive or expansion card. If you install a plug and play device, Windows automatically recognizes the Solving Hardware Installation Problems 237