iv SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
2.5 Power-On Self-Test 2-8
2.6 Selected On-Board Tests 2-8
2.7 Sundiag System Exerciser 2-9
2.8 Forth Toolkit 2-9
2.9 SunDiagnostic Executive 2-10
3. Power-On Self-Test (POST) 3-1
3.1 Power-On Self-Test (POST) 3-1
3.2 Normal Mode 3-4
3.3 Full Diagnostic Mode 3-4
3.4 Abbreviated Diagnostic Mode 3-4
3.4.1 Setting Up a tip Connection to Another Workstation 3-5
3.5 Tests the POST Runs 3-6
3.6 POST Error Messages 3-8
3.7 Status Lights (LEDs) and Indicators 3-8
4. Troubleshooting Procedures 4-1
4.1 No Video Output on the System Monitor 4-2
4.2 Power-On Does Not Succeed 4-2
4.2.1 Power Supply Test 4-3
4.2.2 System Board Test 4-5
4.2.2.1 Caps Lock Key Fails to Flash On and Off During
POST 4-5
4.3 Disk Drive Errors 4-6
4.3.1 Verifying the Built-In SCSI Controller 4-6
4.4 Determining Faulty DSIMM Locations 4-7
5. Safety and Tools Requirements 5-1
5.1 Safety Requirements 5-1
5.2 Symbols 5-2
5.3 System Precautions 5-3
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