Solving Problems
5.3 Interpreting Power-Up Error Messages
A double question mark indicates a hard error that can affect normal operation
and use of some system component. For example:
•
?? 1 00C0 0000.7004
This message indicates that the Ethernet subsystem is present in the
system but that one or more of the following problems exist:
–
No cable is installed on the ThinWire/standard Ethernet connectors.
–
The loopback connector is not installed on the standard Ethernet port.
–
The terminator is not installed on the ThinWire Ethernet port.
–
The network select switch is set to the wrong position.
–
A cable is faulty.
Table 5–2 Power-Up and Self-Test Display Identifiers
Test Identifier
Device
F
Reserved
E
System clock
D
Nonvolatile RAM
C
Serial line controller
B
Memory
A
Memory management unit
9
Reserved
8
Interval timer
7
SCSI-A bus controller
6
SCSI-B bus controller
5
Interrupt controller and Ethernet ID ROM.
4
Reserved
3
Reserved
2
Reserved
1
Ethernet network interconnect (NI).
5–6
