IBM 8275-416, User Manual

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Single-digit display
The single-digit display (shown in Figure 3 on page 10) displays characters while
diagnostics are running after power is applied to the switch. At the successful
completion of diagnostics, the unit number appears in the display (for example, “1”
indicates Unit Number 1). Table 3 gives the meaning of other digits that can be
displayed and the corrective actions required.
Table 3. Problem indications on the single-digit display when the Fault LED is ON.
Character Problem Corrective Action
d Board RAM problem Replace the switch.
3 Detected an unsupported feature
module. Remove the feature module and update
the operational code, or the feature
module is not fully seated in its
connector.
4 PIF fault on the feature module or
base board. If feature module Fault LED is On,
remove the feature module. If no feature
module Fault LED is On, replace the
switch.
5 or 6 Non-volatile memory problem. Replace the switch.
7 Switch memory problem. Replace the switch.
8 Base board loopback problem. Replace the switch.
9 or a Feature module loopback
problem.
v
9 = Feature module in Slot 1 has the
fault; remove this feature module.
v
a = Feature module in Slot 2 has the
fault; remove this feature module.
Chapter 1. Introduction
11