HP Contura 400 Compaq Contura 400 Family of Personal Computers Maintenance and - Page 284

on, in Standby, or in make sure computer is off, Hibernation. unplugged, and the battery pack is removed. Table 5-20. Solving External Device Installation Problems Problem Probable Cause Solution(s) A new device is not Computer Setup has Run Computer Setup. recognized as part of not been run to the computer system. configure the new device. Cable(s) of new Ensure that all cables are external device are properly and securely loose or power cables connected. are unplugged. Power switch of new Turn off the computer, turn external device was on the external device, not turned on when then turn on the computer the computer was to integrate the device powered up. with the computer system. Device is not seated Turn off the computer and properly. reinsert the device. Table 5-21. Solving Keyboard/Numeric Keypad Problems Problem Probable Cause Solution(s) Embedded numeric Num Lock function is Press the Fn+End/Num Lock keypad on computer not turned on. keys to enable the Num Lock keyboard is disabled. function and embedded numeric keypad. Keyboard is locked. QuickLock is Enter password to exit initiated. QuickLock. Table 5-22. Solving Trackball/Mouse Problems Problem Probable Cause Solution(s) Trackball or mouse Incorrect or no Install the device driver does not work. device driver is and add to the AUTOEXEC.BAT installed. file or CONFIG.SYS file. The device driver is Install the Compaq mouse not installed in driver in Windows. Windows. Integrated trackball An external pointing Disconnect the external does not work. device is connected pointing device and restart to the computer and the computer. the system has disabled the integrated trackball.