Sun Microsystems SPARCstation 4 Service Manual page 4

3.4
3.5
3.6
3.7
4. Troubleshooting Procedures 4-1
4.1
4.2
4.3
4.4
5. Safety and Tools Requirements 5-1
5.1
5.2
5.3
5.4
5.5
6. Power On and Off 6-1
6.1
6.2
7. Internal Access 7-1
7.1
7.2
iv SPARCstation 4/Xterminal 1 Service Manual • January 1995
Abbreviated Diagnostic Mode 3-5
3.4.1 Setting Up a tip Connection to Another System 3-5
Tests the POST Runs 3-6
POST Error Messages 3-8
Status Lights (LEDs) and Indicators 3-9
No Video Output on the System Monitor 4-2
Power-On Does Not Succeed 4-3
4.2.1 Power Supply Test 4-3
4.2.2 System Board Test 4-5
Disk Drive Errors 4-5
4.3.1 Verifying the Built-In SCSI Controller 4-6
Determining Faulty DSIMM Locations 4-7
Safety Requirements 5-1
Symbols 5-2
System Precautions 5-3
Tools Required 5-3
Electrostatic Discharge (ESD) Precautions 5-4
Powering Off the System 6-1
6.1.1 When the System Is Working Normally 6-1
6.1.2 When the System Does Not Respond Normally
Powering On the System 6-4
Removing the Cover 7-1
Attaching the Wrist Strap 7-3
6-2