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Chapter 3 Power-On Self-Test 3-21
3.5 Bypassing POST
POST can be disabled and thereby bypassed. To bypass POST:
1. Prior to powering on the system, press and hold the Stop key on the keyboard
(
FIGURE 3-2).
2. With the Stop key pressed, turn on the system by pressing the power-on key.
TABLE 3-2 Keyboard LED Patterns
Caps Lock Compose Scroll Lock Num Lock Meaning of Pattern
On Off Off Off System motherboard
Off On Off Off CPU module 0
Off On On Off CPU module 1
On Off Off On No memory detected
On On Off Off Memory bank 0
On On Off On Memory bank 1
On On On Off Memory bank 2
On On On On Memory bank 3
Off Off Off On NVRAM
- 60 Service 1
- Contents 3
- Contents iv 4
- Contents v 5
- Contents vi 6
- Contents vii 7
- Contents viii 8
- Contents ix 9
- Glossary G-1 10
- Index ix-1 10
- Figures xi 11
- Figures xii 12
- Figures xiii 13
- Figures xiv 14
- Tables xv 15
- Tables xvi 16
- How This Book Is Organized 17
- UNIX Commands 18
- Shell Prompts 19
- Typographic Conventions 19
- Related Documents 20
- Ordering Sun Documentation 21
- Sun Welcomes Your Comments 22
- Product Description 23
- Ultra 60 Desktop Workstation 24
- System unit 24
- Keyboard 24
- Mouse/pad 24
- Monitor (24-inch optional) 24
- 1.1 I/O Devices 25
- 1.2 System Unit Features 25
- 1.3 System Unit Components 27
- Component Description 28
- SunVTS Overview 31
- 2.2 SunVTS Operation 32
- Power-On Self-Test 33
- 3.1 POST Overview 34
- 3.2 Pre-POST Preparation 34
- 3.2.2 Verifying the Baud Rate 36
- 3.3 Initializing POST 37
- CODE EXAMPLE 3-1 identifies a 39
- TABLE 3-2 51
- 3.5 Bypassing POST 53
- Commands 54
- 3.7 System and Keyboard LEDs 54
- Troubleshooting Procedures 57
- 4.1 Power-On Failure 58
- 4.2 Video Output Failure 59
- TABLE 4-1 60
- 4.4 Power Supply Test 61
- Power Supply Connector J2901 62
- Power Supply Connector J2902 62
- 4.5 DIMM Failure 63
- DIMM Physical Memory Address 64
- 4.6.1 watch-clock 65
- 4.6.5 UPA Graphics Card 68
- 4.7 OpenBoot Diagnostics 69
- CODE EXAMPLE 4-7) 70
- CODE EXAMPLE 4-8) 70
- 4.7.1 PCI/Cheerio 71
- 4.7.2 EBus DMA/TCR Registers 72
- 4.7.3 Ethernet 72
- 4.7.4 Keyboard 73
- 4.7.5 Mouse 74
- 4.7.6 Floppy 74
- 4.7.7 Parallel Port 74
- 4.7.8 Serial Port A 75
- 4.7.9 Serial Port B 77
- 4.7.10 NVRAM 78
- 4.7.11 Audio 78
- 4.7.12 SCSI 79
- 4.7.13 All Above 79
- Safety and Tool Requirements 83
- 5.1 Safety Requirements 84
- 5.2 Symbols 84
- 5.3 Safety Precautions 85
- 5.4 Tools Required 86
- Power On and Off 87
- FIGURE 6-1) or press the Sun 88
- FIGURE 6-2) 88
- Internal Access 91
- 7.2 Attaching the Wrist Strap 93
- Wrist strap 94
- System unit rear 94
- (service position) 95
- Major Subassemblies 97
- 8.1 Power Supply 98
- Peripheral power cable 99
- Captive screw (4) 99
- Power supply 99
- (partially extended) 99
- Power cable 100
- 8.2 PCI Fan Assembly 101
- FIGURE 8-3) 102
- FIGURE 8-4): 104
- SCSI drive bay 105
- Screw (2) 105
- 8.4 Cable Assemblies 107
- 8.5 EMI Filler Panels 110
- 2. Replace the RMA 111
- 8.6 Chassis Foot 112
- 8.7 Speaker Assembly 113
- Speaker assembly 114
- Speaker cable 114
- 8.8 DC Switch Assembly 115
- Lock Block Location 116
- Lock block 116
- System unit front 117
- Side access cover 117
- 4. Attach the wrist strap 118
- PCI card 119
- Bracket tab 119
- UPA graphics card 120
- FIGURE 8-7): 121
- Hard drive handle 122
- Hard drive 122
- Handle latch 122
- FIGURE 8-17): 123
- DC power connector 125
- DC power cable routing 125
- FIGURE 8-20): 126
- FIGURE 8-16): 129
- FIGURE 8-15): 129
- FIGURE 8-13 and FIGURE 8-14) 129
- FIGURE 8-21) 129
- Sun Type-5 Keyboard 131
- Power on key 131
- 8.9 CPU Fan Assembly 132
- Shroud assembly 133
- Metal handle 133
- Snap catch 133
- 8.10 Shroud Assembly 134
- Locking lever 135
- Captive screw 135
- Storage Devices 137
- 9.1 Hard Drive 138
- 9.1.2 Replacing a Hard Drive 139
- 9.2.1 Removing the RMA 140
- Chapter 9 Storage Devices 9-5 141
- FIGURE 9-2): 141
- Tape Drive 142
- Chapter 9 Storage Devices 9-7 143
- 9.2.6 Replacing the RMA 145
- 6. Power on the system unit 146
- Motherboard and Component 147
- Replacement 147
- 10.1 CPU Module 148
- CPU module 149
- Lever (2) 149
- FIGURE 10-1): 150
- 10.2 NVRAM/TOD 151
- NVRAM/TOD 152
- 10.3 PCI Card 153
- 10.3.2 Replacing a PCI Card 155
- 10.4 UPA Graphics Card 156
- 10.5 DIMM 158
- 10.5.1 Removing a DIMM 159
- Removing and Replacing a DIMM 160
- 10.5.2 Replacing a DIMM 161
- 10.6 Audio Card 162
- FIGURE 10-6): 163
- Audio card 164
- 10.7 Motherboard 165
- 10.7.1 Removing a Motherboard 166
- Screw (3) 167
- Serial Port Jumper Settings 169
- FIGURE 10-8) 171
- FIGURE 10-7) 171
- Illustrated Parts List 173
- Numerical 175
- Product Specifications 177
- A.1 Physical Specifications 178
- A.2 Electrical Specifications 178
- Environmental Requirements 179
- Signal Descriptions 181
- B.1 Keyboard/Mouse and Serial 182
- Ports A and B 182
- B.3 UltraSCSI Connector 186
- B.4 Audio Connectors 190
- B.5 Parallel Port Connector 191
- MII Connector Pin Assignments 194
- Pin Signal Name Description 195
- FIGURE B-8 196
- TABLE B-8 lists the 196
- Functional Description 199
- C.1 System Unit 200
- C.1.1 UPA Interconnect 202
- C.1.2 System Controller 203
- C.1.3 PCI Bus 204
- C.1.4 EBus2 Devices 205
- C.1.5 UltraSPARC II Processor 206
- C.1.6 Memory System 207
- FIGURE C-5 DIMM Mapping 210
- C.1.6.1 DIMM 211
- C.1.7 Graphics and Imaging 212
- C.1.8 Peripherals 213
- C.1.8.1 CD-ROM Drive 214
- C.1.8.2 Diskette Drive 214
- Diskette Drive Signals 215
- C.1.8.3 Hard Drives 216
- C.1.10.2 Diskette Port 218
- C.1.10.3 Parallel Port 219
- C.1.11 Serial Port 220
- Serial Port Functions 221
- EIA Levels 221
- C.1.12 Ethernet 222
- C.1.12.3 External Cables 224
- C.1.12.4 Connectors 224
- C.1.12.5 MII Power 224
- C.1.12.6 MII Port Timing 224
- (Cheerio ASIC) 225
- Audio Card Features 226
- C.1.14 SCSI 228
- C.1.14.3 External Cables 229
- FIGURE C-11 230
- C.1.15 ASICs 231
- C.1.15.2 Marvin 232
- C.1.15.3 Cheerio 232
- C.1.15.4 PSYCHO+ 232
- C.1.15.5 FBC 233
- C.1.15.6 RISC 233
- C.2 Power Supply 234
- C.2.1 Control Signals 235
- Turning the System Unit On 236
- Turning the System Unit Off 237
- CPU Modules 237
- PCI Cards 238
- Memory System 239
- Mass Storage Devices 239
- C.2.2 Built-In Speaker 240
- C.3 Motherboard 241
- C.4 Jumper Descriptions 243
- C.4.1 Serial Port Jumpers 244
- C.5 Enclosure 245
- C.6 Environmental Compliance 246
- C.7 Agency Compliance 246
- Glossary 249
- Glossary-3 251
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