15. The console, cables, or the workstation IOP card is the most probable causes for this failure. If the
console is connected to the system by a link protocol converter, the link protocol converter is possibly
the failing item. Use one or more of the following options to correct the problem:
a. See the service information for the failing displays for more information. If a display is connected
to the system by a link protocol converter, see the link protocol converter information to attempt to
correct the problem.
b. If you have another working display, you can exchange the console and perform an IPL to attempt
to correct the problem.
c. Exchange the following parts one at a time until you determine the failing item:
1) Console
2) Workstation IOA
3) The multi-adapter bridge. See symbolic FRU “MA_BRDG” on page 363.
4) Twinaxial attachment (cable)
This
ends the procedure.
16. To continue problem analysis, use a port tester, part 93X2040 or 59X4262, which you may have with
your tools or the customer may have one. The port tester has either two or three lights.
Is a port tester available?
v Yes: Continue with the next step.
v No: Check or exchange the cables from the system to the failing display. Did this correct the
problem?
– Yes: You corrected the problem.
This ends the procedure.
– No: Go to step 13 (See page 241).
17.
To use the port tester to isolate the problem, perform the following:
DANGER
To prevent a possible electrical shock, do not use the port tester during electrical storms. (RSFTD006)
v Verify that the port tester is operating correctly by doing a self-test. A self-test can be made at any
time, even when the port tester is attached to a port or cable. Perform the following steps to do a
self-test:
a. Move the selector switch to the center (0) position.
b. Push and hold the test button until all lights go on. The yellow lights should go on immediately,
and the green light should go on approximately 5 seconds later. The port tester is ready for use
if all lights go on.
v
Leave the system power on.
18. Find the input cable to the failing console or port.
Is the failing console or the failing port attached to a protocol converter?
v No: Perform the following:
a. Disconnect the input cable from the failing console.
b. Connect the port tester to the input cable.
c. Continue with the next step.
v
Yes: Perform the following:
a. Disconnect the cable that comes from the system at the protocol converter.
b. Connect the port tester to the cable.
c. Continue with the next step.
19.
Perform the following:
a. Set the selector switch on the port tester to the left (1) position for a twinaxial connection. Set the
switch to the right (2) position for a twisted pair connection.
242 iSeries: iSeries Server 270, 800, 810, 820, 825, 830, 840, 870, 890, SB2, and SB3 Hardware Problem Analysis and
Isolation
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