HP Contura 400 Compaq Contura 400 Family of Personal Computers Maintenance and - Page 285

Trackball or mouse Mouse device driver Enter MOUSE at the system does not work even is not activated prompt to activate the though the device (loaded into memory) mouse device driver. driver is in the in MS-DOS. PATH command of the Add a line in the AUTOEXEC.BAT file. AUTOEXEC.BAT file to automatically activate the mouse device driver each time the computer is turned on or restarted. Defective trackball Replace the trackball assembly. assembly. Defective system Replace the system board. board. Mouse device driver From Windows, run Windows is not correctly Setup and select the proper installed in Windows. mouse driver. Cursor skips or moves The ball, rollers, or Clean the ball in the abnormally when using tracking post in the trackball or mouse. a trackball or mouse. trackball or mouse need cleaning. Defective trackball Replace trackball assembly. assembly. Table 5-23. Solving Memory Problems Problem Probable Cause Solution(s) Memory count during Optional memory 1. Ensure that the Power-On Self-Test board is installed appropriate memory board (POST) is incorrect. incorrectly, is has been installed incompatible with the correctly. computer, or is con- 2. Run Computer Setup figured incorrectly. "Out of Memory" Too many TSRs are Delete any TSR applications message is displayed installed. that you do not need. on the screen or insufficient memory Memory configuration Reconfigure the memory error occurs during is not set up using MS-DOS MEMMAKER. operation. correctly. System ran out of 1. Check the application memory for the documentation for memory application. requirements. 2.Increase memory. Table 5-24. Solving PC Card Problems Problem Probable Cause Solution(s)