vi Contents
Replacing the Front Panel.............................................................................. 3-26
Replacing the 3 1/2-Inch Drive Bracket......................................................... 3-27
Adding External Options.............................................................................................. 3-28
Parallel Printer ...................................................................................................... 3-29
RS-232C Device Connection................................................................................. 3-30
Section 4 Maintenance and Troubleshooting
Online Services ............................................................................................................ 4-1
NEC’s FastFacts Service....................................................................................... 4-2
NEC Bulletin Board Service.................................................................................. 4-3
America Online Service......................................................................................... 4-5
Internet ................................................................................................................. 4-6
Maintenance ................................................................................................................ 4-6
System Cleaning.................................................................................................... 4-6
Keyboard Cleaning................................................................................................ 4-7
Mouse Cleaning .................................................................................................... 4-7
Troubleshooting........................................................................................................... 4-9
Diagnosing and Solving Problems ......................................................................... 4-9
CMOS Battery Replacement ................................................................................. 4-13
Section 5 System Unit Repair
Disassembly And Reassembly....................................................................................... 5-1
System Unit Cover Removal ................................................................................. 5-2
Expansion Board Removal .................................................................................... 5-3
PCI/ISA Backboard Removal................................................................................ 5-5
3 1/2-inch Diskette and Hard Disk Drive Removal ................................................ 5-5
Front Panel Assembly Removal ............................................................................. 5-7
Blank Panel Removal ............................................................................................ 5-8
Speaker Assembly Removal .................................................................................. 5-8
Removing the Secondary Cache ............................................................................ 5-9
SIMM Removal .................................................................................................... 5-9
5 1/4-Inch Device Removal ................................................................................... 5-10
Power Supply Removal ......................................................................................... 5-11
System Board Removal ......................................................................................... 5-13
Illustrated Parts Breakdown .................................................................................. 5-14