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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HP LH 6000 manual Replacing Parts