Troubleshooting Procedures; Power-On Failure - Sun Microsystems Sun Ultra 60 Service Manual

4
CHAPTER

Troubleshooting Procedures

This chapter describes how to troubleshoot possible hardware problems and includes
suggested corrective actions.
This chapter contains the following topics:
4 Section 4.1 "Power-On Failure" on page 4-1
4 Section 4.2 "Video Output Failure" on page 4-2
4 Section 4.3 "Disk Drive or CD-ROM Drive Failure" on page 4-3
4 Section 4.4 "Power Supply Test" on page 4-4
4 Section 4.5 "DIMM Failure" on page 4-6
4 Section 4.6 "OpenBoot PROM On-Board Diagnostics" on page 4-7
4 Section 4.7 "OpenBoot Diagnostics" on page 4-12
4.1

Power-On Failure

This section provides examples of power-on failure symptoms and suggested actions.
Symptom
The system unit does not power up when the keyboard power switch is pressed.
Action
Check the keyboard connection. Ensure that the keyboard is properly connected to
the system unit. Check the AC power cord. Ensure that the AC power cord is
properly connected to the system unit and to the wall receptacle. Verify that the wall
receptacle is supplying AC power to the system unit.
4-1