Troubleshooting Procedures - Sun Microsystems SPARCstation 5 Model 110 Service Manual

4
C H A P T E R

Troubleshooting Procedures

This chapter describes how to troubleshoot SPARCstation 5 system problems. Each
problem is described, and a set of procedures is provided as a solution to the
problem.
"No Video Output on the System Monitor" on page 2
"Power-On Does Not Succeed" on page 2
"Disk Drive Errors" on page 6
"Determining Faulty DSIMM Locations" on page 7
TABLE 4-1
TABLE 4-1
Problem
LED on front of system is not lit.
Disk drive fails to boot or does not
respond.
Operating system does not
recognize disk drive at boot up.
No video output on monitor.
Slow disk drive response.
describes commonly encountered problems, and tips for solving them.
Troubleshooting Tips
Action
Verify that the power switch is turned on and that the power cord is
connected. If both the power switch and the power cord are connected,
shut down the system and verify that the LED cable is connected. If the
LED cable is connected, the power supply may be defective. Replace the
power supply. See Chapter 8.
Shut down the system. The SCSI controller may be defective. See
Section 4.3.1 "Verifying the Built-In SCSI Controller." Verify that each
SCSI device is assigned a unique SCSI target address. See Appendix C for
important additional information.
Shut down the system. Verify that each SCSI device is assigned a unique
SCSI target address. See Appendix C for important additional
information.
Verify that the power cord is connected. Use a volt-ohmmeter (VOM) to
check voltages. See Section 4.1 "No Video Output on the System
Monitor."
If many SCSI devices are connected to the same SCSI bus and if some of
these devices are "fast SCSI" devices, you can install an FSBE/S SBus
card to the "fast SCSI" devices to speed up performance.
4-1