Contents

Preventive Maintenance Procedures ...........................................................................................................

55

Troubleshooting Tips....................................................................................................................................

55

General Troubleshooting Sequence ........................................................................................................

56

The System Will Not Power Up ...............................................................................................................

57

The System Will Not Boot ........................................................................................................................

57

Intermittent Failures .................................................................................................................................

57

Clearing the System Configuration ..............................................................................................................

57

Password Problems .....................................................................................................................................

59

BIOS Recovery.............................................................................................................................................

60

Troubleshooting Checklist............................................................................................................................

61

General System Problems ...........................................................................................................................

62

Memory Problems ........................................................................................................................................

64

CD-ROM Problems ......................................................................................................................................

65

Flexible Disk Drive Problems .......................................................................................................................

66

Keyboard and Mouse Problems...................................................................................................................

67

Network Interface Card Problems................................................................................................................

67

Power Problems...........................................................................................................................................

68

SCSI Subsystem Problems..........................................................................................................................

69

Video/Monitor Problems...............................................................................................................................

73

Configuration Problems................................................................................................................................

75

Verifying Hard Disk Drive Operation ............................................................................................................

76

Processor Problems.....................................................................................................................................

77

Printer/DataComm Problems .......................................................................................................................

78

6..Replacing Parts ..........................................................................................................................................

79

Safety Information ........................................................................................................................................

79

Service Tools Required................................................................................................................................

79

Replacing Power Supply Module(s).............................................................................................................

79

Replacing the Control Panel ........................................................................................................................

80

Replacing the HP NetRAID DIMM ...............................................................................................................

81

Replacing the System Battery......................................................................................................................

82

Replacing the NetRAID Battery Backup Module (Optional).........................................................................

84

Replacing System Memory ..........................................................................................................................

85

Replacing a Processor .................................................................................................................................

88

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