IBM Application System/400 Service Information page 106

c. Press Enter on the control panel.
d. Check the console for a display.
Does a display appear on the console?
No Yes
If you disconnected any devices
after the console in step 1 of this
procedure, perform the following:
a. Power off the system (see
"Power off" on page 5-2).
b. Reconnect one device.
Note: Ensure that you termi-
nate the device that you just
reconnected and remove the
termination from the previously
terminated device.
c. Power on the system (see
"Power on" on page 5-2).
d. If a reference code appears on
the control panel, go to step 6
of this procedure.
e. If no reference code appears,
repeat steps a through d of this
step until you have checked all
devices disconnected before.
f. Continue to perform the initial
program load (IPL).
This ends the procedure.
6
Ensure that the following conditions are
met:
• The workstation addresses of all work-
stations on the failing port must be
correct.
Each workstation on the port must have
a separate address, from 0 through 2.
See the workstation manual if you need
help with checking addresses.
• The last workstation on the failing port
must be terminated. Any other work-
stations on that port must not be termi-
nated.
• The cables attached to the console on
the failing port must be tight and have
no visible damage.
If there were any cable changes in this
area, check them carefully.
Did you find a problem with any of the
above conditions?
3-16
AS/400 9401 Service Information
Yes No
Go to step 9 of this procedure.
7
Perform the following:
a. Correct the problem.
b. Select Function 21 (Bring up DST).
c. Press Enter on the control panel.
d. Check the console for a display.
Does a display appear on the console?
No Yes
Continue to perform the I PL.
This ends the procedure.
8
Does the same reference code appear on
the control panel?
Yes No
~ Go to "Unit Reference Code
Tables" on page 2-3 for this new
problem.
This ends the procedure.
9
Is the reference code one of the
following: 0001, 0003, 0005, 0006, 0101,
0103,0104,0105,0106,5004,5082, BOOO,
0010, or D023?
No Yes
Go to step 11 of this procedure.
1 0
There is either a Licensed Internal Code
problem or two device failures on the work-
station 1/0 processor, console, or cables.
The console is the most probable cause for
this failure.
• See the manuals for the failing display
to attempt to correct the problem.
• Exchange the following parts one at a
time until you determine the failing item:
a. Console (70%)
b. Cables (20%)
c. Chassis (10%)
• If you have another working display,
you can exchange the console and
perform an IPL to attempt to correct the
problem.
This ends the procedure.