Sun Microsystems Ultra 5, Service Manual

Page: 73 / 258

4-1
C H A P T E R
4
Troubleshooting Procedures
This chapter describes how to troubleshoot possible hardware problems and
includes suggested corrective actions.
This chapter contains the following topics:
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Section 4.1 “Power-On Failure” on page 4-2
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Section 4.2 “Video Output Failure” on page 4-3
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Section 4.3 “Hard Drive or CD-ROM Drive Failure” on page 4-4
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Section 4.4 “Power Supply Test” on page 4-5
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Section 4.5 “DIMM Failure” on page 4-7
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Section 4.6 “OpenBoot PROM On-Board Diagnostics” on page 4-8
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Section 4.7 “OpenBoot Diagnostics” on page 4-12