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viii Sun Fire V120 and Netra 120 Server User’s Guide • December 2001
9.3.5 Making the LOM Interface Backward Compatible (lom -B) 9-13
9.3.6 Upgrading the LOM Firmware
(lom -G filename) 9-13
Part III Troubleshooting and Maintenance
10. Troubleshooting 10-1
10.1 Introduction to the POST, obdiag, and SunVTS Diagnostic Tools 10-2
10.1.1 Using POST Diagnostics 10-2
10.1.2 Using OpenBoot Diagnostics (obdiag) 10-3
10.1.3 Using SunVTS 10-5
10.2 Additional Diagnostic Tests for Specific Devices 10-8
10.2.1 Using the probe-scsi Command To Confirm That Hard Disk
Drives Are Active 10-8
10.2.2 Using the probe-ide Command To Confirm That the DVD or CD-
ROM Drive is Connected 10-9
10.2.3 Using the watch-net and watch-net-all Commands To Check
the Network Connections 10-9
10.3 Solutions to Problems You Might Encounter 10-10
10.4 Interpreting the Front and Back Panel LEDs 10-12
11. Replacing a Server or Replacing Individual Components 11-1
11.1 Replacing a Server 11-2
11.2 Field Replaceable Units 11-4
11.3 Replacing the Memory Card Reader for the System Configuration Card
11-5
11.4 Replacing the DVD or CD-ROM Drive, Cable, and Paddleboard 11-7
11.5 Replacing the NVRAM Chip 11-9
11.6 Replacing the System Board 11-12
11.6.1 Removing the Old System Board 11-12
11.6.2 Installing the New System Board 11-15
11.7 Replacing the Power Supply Unit 11-17
11.8 Replacing the Rear Fan Subassembly (Fans 1 and 2) 11-19