Compaq AlphaServer DS20 Service Manual Page 157
- Page / 182
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Managing the System Remotely B-13
B.5
Troubleshooting Guide
Table B-3 is a list of possible causes and suggested solutions for symptoms you
might see.
Table B-3 RCM Troubleshooting
Symptom Possible Cause Suggested Solution
The local console
terminal is not
accepting input.
Cables not correctly installed.
Switch 1 on switchpack set to
disable.
Check external cable
installation.
Set switch 1 to ON.
The console terminal
is displaying garbage.
System and terminal baud rate
set incorrectly.
Disable RCM and set
the system and terminal
baud rates to 9600
baud.
After the system and
RCM are powered up,
the COM port seems
to hang briefly.
This delay is normal behavior. Wait a few seconds for
the COM port to start
working.
RCM installation is
complete, but system
does not power up.
RCM Power Control: is set to
DISABLE.
Cables not correctly installed.
Invoke RCM and issue
poweron command.
Reseat the cables.
You reset the system
to factory defaults, but
the factory settings did
not take effect.
AC power cords were not
removed before you reset
switch 4 on the RCM
switchpack.
Refer to Section B.4.
The message
“unknown command”
is displayed when the
user enters a carriage
return by itself.
The terminal or terminal
emulator is including a
linefeed character with the
carriage return.
Change the terminal or
terminal emulator
setting so that “new
line” is not selected.
- AlphaServer DS20 1
- Contents 3
- Chapter 3 Error Registers 4
- Appendix C Firmware Update 5
- Examples 5
- Intended Audience 9
- Document Structure 9
- Documentation Titles 10
- Information on the Internet 10
- System Overview 11
- Chapter 1 11
- System Enclosure 12
- PKW-0501-97 14
- System Consoles 16
- System Architecture 18
- CPU Types 20
- Figure 1-6 Memory Placement 22
- PK1488-98 24
- Example 1–1 Show Memory 25
- Interrupts 28
- Table 1-1 PCI Slot Numbering 31
- PK1410-99 32
- Table 1-2 Switchpack 2 33
- Table 1-3 Switchpack 3 33
- Server Feature Module 34
- 1.9.1 Power Control Logic 36
- PK1493-98 38
- Power Supply 40
- Power Up/Down Sequence 42
- Maintenance Bus (I 46
- Error State 47
- StorageWorks Drives 48
- System Overview 1-39 49
- Chapter 2 51
- Troubleshooting 51
- Testing an Entire System 59
- Other Useful Console Commands 61
- Troubleshooting with LEDs 62
- Compaq Analyze 64
- Continued on next page 67
- Table 2-2 Types of Errors 69
- Releasing Secure Mode 70
- Chapter 3 71
- Error Registers 71
- Ibox Status Register - I_STAT 72
- MM_STAT 73
- PK1416-99 75
- Cbox Read Register 77
- Miscellaneous Register (MISC) 79
- PK1418-99 82
- Pchip Error Register (PERROR) 83
- Failure Register 86
- Table 3-8 Failure Register 87
- Function Register 88
- Table 3-9 Function Register 89
- Chapter 4 91
- Removal and Replacement 91
- FRU List 92
- System Access 96
- CPU Removal and Replacement 98
- Figure 4-4 Removing Memory 100
- System Board 102
- Slot Cover 104
- Option Card 104
- Replacement 106
- PK1404-99 110
- PK1481 - 9 114
- Module Guides 116
- PKW0519A-97 118
- ➊ in Figure 119
- Replacement 120
- Figure 4-15 Removing CD-ROM 122
- PK1401-98 124
- PKW0501B-97 126
- PK1412-99 130
- Appendix A 133
- Halts, Console Commands, and 133
- Environment Variables 133
- Halt Button Functions 134
- Using the Halt Button 135
- Halt Assertion 136
- Appendix B 145
- Managing the System Remotely 145
- RCM Overview 146
- First-Time Setup 147
- ➊ in Example 148
- RCM Commands 149
- Using the RCM Switchpack 154
- Troubleshooting Guide 157
- Appendix C 159
- Firmware Update 159
- PK1461-98 160
- Diskettes 166
- Update 168
- (Continued) 170
- Internal Floppy Disk 171
- C.1.5 LFU Commands 176
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