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6.10.2 What Next 183
7. Diagnostics and Troubleshooting 185
7.1 About Diagnostic Tools 186
7.2 About Power-On Self-Test (POST) Diagnostics 187
7.3 How to Use POST Diagnostics 188
7.3.1 Before You Begin 188
7.3.2 What to Do 189
7.3.3 Results 189
7.4 How to Set Up a tip Connection 190
7.4.1 How to Verify the Baud Rate 192
7.5 About OpenBoot Diagnostics (OBDiag) 192
7.5.1 OBDiag Menu 193
7.5.2 Configuration Variable 194
7.6 How to Use OpenBoot Diagnostics (OBDiag) 195
7.6.1 What to Do 195
7.6.2 OBDiag Tests 197
7.6.3 PCI/Cheerio 197
7.6.4 EBus DMA/TCR Registers 198
7.6.5 Ethernet 199
7.6.6 Keyboard 200
7.6.7 Mouse 200
7.6.8 Parallel Port 200
7.6.9 Serial Port A 201
7.6.10 Serial Port B 202
7.6.11 NVRAM 203
7.6.12 Audio 203
7.6.13 SCSI 203
7.6.14 All Above 203
Contents 11