NEC EXPRESS5800/120Rc-2 Service Manual page 7

Front Bezel ......................................................................................................................... 4-4
Removing the Front Bezel ............................................................................................ 4-4
Replacing the Front Bezel............................................................................................. 4-5
Top Cover........................................................................................................................... 4-6
Removing the Top Cover.............................................................................................. 4-6
Replacing the Top Cover .............................................................................................. 4-7
Modifying the System Board ............................................................................................. 4-8
Replacing the Real-time Clock Battery......................................................................... 4-8
Removing and Installing a Pentium III Processor....................................................... 4-10
DIMMs........................................................................................................................ 4-18
Option Boards .................................................................................................................. 4-21
Recommended PCI Option Board Locations.............................................................. 4-21
Installing a PCI Option Board..................................................................................... 4-22
Removing a PCI Option Board ................................................................................... 4-26
Hard Disk Drives.............................................................................................................. 4-27
SCSI ID Assignment................................................................................................... 4-27
Installing or Swapping a Hard Disk Drive in a Hot-swap Bay ................................... 4-28
Installing or Swapping a Hard Disk Drive.................................................................. 4-29
Power Supply ................................................................................................................... 4-31
Installing the Optional Power Supply ......................................................................... 4-31
Replacing a Power Supply .......................................................................................... 4-32
Removable Media Devices............................................................................................... 4-33
Installing a Removable Media Device ........................................................................ 4-34
System Fans ..................................................................................................................... 4-40
Replacing a System Fan.............................................................................................. 4-40
Replacing the Power Switch and LED Assembly ............................................................ 4-42
Replacing the System Board ............................................................................................ 4-46
Replacing the SCSI Backplane ........................................................................................ 4-50
Replacing the Power Backplane....................................................................................... 4-54
Replacing the Diskette Drive or CDROM Drive ............................................................. 4-56
Problem Solving..................................................................5-1
Problem Solving................................................................................................................. 5-2
Static Precautions ............................................................................................................... 5-2
Troubleshooting Checklists................................................................................................ 5-3
Initial System Startup.................................................................................................... 5-3
Running New Application Software ............................................................................. 5-4
After System Has Been Running Correctly .................................................................. 5-5
Diagnostic Testing.............................................................................................................. 5-6
Error Checking.............................................................................................................. 5-6
Troubleshooting Guide ................................................................................................. 5-6
Preparing the System for Diagnostic Testing........................................................ 5-6
Monitoring POST.................................................................................................. 5-7
Verifying Proper Operation of Key System Indicators ......................................... 5-8
Confirming Loading of the Operating System ...................................................... 5-8
Specific Problems and Corrective Actions......................................................................... 5-9
Power LED Does Not Light.......................................................................................... 5-9
Incorrect or No Beep Code ......................................................................................... 5-10
No Characters Appear on Screen ................................................................................ 5-10
Characters are Distorted or Incorrect .......................................................................... 5-11
System Cooling Fans Do Not Rotate .......................................................................... 5-11
Diskette Drive Activity LED Does Not Light............................................................. 5-11
CD-ROM Drive Activity Light Does Not Light ......................................................... 5-11
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