Digital Equipment 300 Series AXP Reference Manual page 40

Recording Information Before Making Changes
Two question marks (??) next to a component name in the
System
Configuration DEVSTAT column indicate a problem with that component. If
you normally use the
Errors
your diagnostic startup mode, the error message consists of the
question marks alone. Refer to Chapter 8 for an explanation of
the error line.
To display the error message, you must enter the following
command:
>>>show error
Example:
>>> show error
?? 004 SCC 0x0060
?T-ERR-SCC-MOUSE - 0 char rcvd
Refer to Chapter 4 for an explanation of the
command.
If you use the
diagnostic startup mode (a full startup sequence occurs), then
you will see two question marks in the display; see Figure 2–3.
Note any field replaceable unit (FRU) number and error number.
An FRU is a replaceable drive or module. See Chapter 8 for
additional information about error messages and FRU codes.
2–8
set diag_quick on
Return
command to define your
set diag_quick off
command to define
show error