7.7 How to Set the Diagnostic Level for POST and OBDiag 205
7.7.1 Before You Begin 205
7.7.2 What to Do 206
7.8 About SunVTS Software 206
7.8.1 For More Information 207
7.9 How to Check Whether SunVTS Software Is Installed 208
7.9.1 Before You Begin 208
7.9.2 What to Do 208
7.9.3 What Next 209
7.10 How to Use SunVTS Software 209
7.10.1 Before YouBegin 209
7.10.2 What to Do 209
7.10.3 Results 211
7.11 About Sun Enterprise SyMON Software 211
7.12 About TroubleshootingYour System 211
7.12.1 Error Indications 212
7.12.2 Software Commands 216
7.13 About Diagnosing Specific Problems 225
7.13.1 Network Communications Failure 225
7.13.2 Power-On Failures 227
7.13.3 Disk or CD-ROM Drive Failure 227
7.13.4 SCSI Controller Failures 229
7.13.5 Power Supply Failure 229
7.13.6 DIMM Failure 229
A. Connector Signal Descriptions 231
A.1 Reference for the Keyboard/Mouse Connector 231
A.1.1 Keyboard/Mouse Connector Diagram 231
A.1.2 Keyboard/Mouse Connector Signals 232
12 Sun Enterprise 220R Server Service Manual January 2000, Revision A