IBM 6H0, Service Manual

Page: 172 / 561

Table 2. Firmware Checkpoints (continued)
Checkpoint Description Action/
Possible Failing FRU
E1DC Dynamic console selection. If a console is attached but nothing
is displayed on it, follow the steps
associated with
″
All display
problems
″
in the Entry MAP tables.
If selection screen(s) can be seen
on the terminals and the
appropriate key on the input device
associated with the desired display
or terminal is pressed, within 60
seconds, but there is no response
to the keystroke:
v If selecting the console with a
keyboard attached to the system,
replace the keyboard. If replacing
the keyboard does not fix the
problem, replace the primary I/O
backplane.
v
If selecting the console with an
ASCII terminal, suspect the
ASCII terminal. Use the problem
determination procedures for the
terminal. Replace the primary I/O
backplane if these procedures do
not reveal a problem.
Note: Terminal settings should
be set to:
– 9600 Baud
– No Parity
– 8 Data bits
– 1 Stop bit
E1DE Alternating pattern of E1DE and
E1AD is used to indicate a default
catch condition before the firmware
″
checkpoint
″
word is available.
See the note on page 139.
E1DF Create diskette drive (disk) node See the note on page 139.
E1F0 Start O.B.E. See the note on page 139.
E1F1 Begin selftest sequence on boot
device(s). Begin SMS.
See the note on page 139.
E1F2 Power-on password prompt. Prompt should be visible on the
system console.
If a console is attached but nothing
is displayed on it, go to the “Entry
MAP” on page 75 with the symptom
″
All display problems.
″
152
Service Guide