Digital Equipment DECstation 5000/100 Series, Maintenance Manual

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Using Error and Status Register Error Logs . . . . . . . . . . 3–15
Example 1: Error and status register error log . . 3–15
Analysis of Example 1 . . . . . . . . . . . . . . . . . . . . . . . 3–17
Example 2: Error and status register error log . . 3–18
Analysis of Example 2 . . . . . . . . . . . . . . . . . . . . . . . 3–20
Physical address space . . . . . . . . . . . . . . . . . . . . . . . 3–21
For Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3–22
4 Identifying Failed FRUs
Troubleshooting Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Troubleshooting When the Power-Up Self-Test Does Not
Complete . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4–4
How to Troubleshoot When the Diagnostic LED Display
Is 0011 1011, 0010 1011, 0001 1011, or 0000 1011 . . . . . . 4–10
Troubleshooting when the right diagnostic LED
display is 1011 and the system has a graphics
module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–10
Troubleshooting when the right diagnostic LED
display is 1011 and the system has no graphics
module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11
Troubleshooting When the Monitor Has No Display . . . . . . . 4–12
Troubleshooting When an Error Message Appears on the
Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–14
How to Troubleshoot When an Error or Exception Occurs
During a Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–14
How to Troubleshoot When a Test Reports an Error . . . . 4–15
How to Troubleshoot When a Console Exception
Occurs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–19
Example: R4000 Console exception message . . . . 4–19
Example: R3000 Console exception message . . . . 4–20
Troubleshooting When Hardware Does Not Appear in the
cnfg Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–22
Troubleshooting the Memory Modules . . . . . . . . . . . . . . . . . . . 4–24
To Interpret Memory Test Error Messages . . . . . . . . . . . . 4–26
Example: Memory test error message . . . . . . . . . . 4–26
Troubleshooting SCSI Controllers and Devices . . . . . . . . . . . . 4–27
How to Use the sdiag Test . . . . . . . . . . . . . . . . . . . . . . . . . . 4–29
Troubleshooting an Ethernet Controller . . . . . . . . . . . . . . . . . 4–30
How to Use the External Loopback Test . . . . . . . . . . . . . . 4–32
Example: External loopback test error
messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–32
Troubleshooting a Printer, Modem, or Other Serial Line
Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–33
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