iv SPARCstation 20 Service Manual • July 1996
Setting Up a tip Connection 19
POST Tests 20
POST Error Messages 23
Status LEDs and Indicators 23
Completing POST 25
4. Troubleshooting Procedures 27
Video Output Failure 28
Power-On Does Not Succeed 29
Power Supply Test 29
System Board Test 31
Caps Lock Key Fails to Flash During the POST 32
Disk Drive Errors 33
SIMM Errors 35
5. Safety and Tools Requirements 39
Safety Requirements 39
Symbols 40
System Precautions 41
Lithium Battery 42
Required Tools 42
Electrostatic Discharge (ESD) Precautions 42
6. Power On and Off 45
Removing Power from the System 45
Restarting the System While Troubleshooting 46
Reading Boot Messages 47
Turning On the Power 47
7. Internal Access 49
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