IBM iSeries 800 Hardware Problem Analysis And Isolation

b. Press and hold the test switch on the port tester for 15 seconds and observe the lights.
c. Choose from the following options:
v If the port tester has three lights, do the following:
– If only the top (green) light is on, go to step 28 (See page 244).
– If both the top (green) and center (yellow) lights are on, go to step 21 (See page 243).
Note: The center (yellow) light is always on for twisted pair cable and may be on for fiber
optical cable.
– If only the bottom (yellow) light is on, go to step 22 (See page 243).
– If all lights are off, go to step 23 (See page 243).
– If all lights are on, go to step 20 (See page 243).
v
If the port tester has two lights, do the following:
– If only the top (green) light is on, go to step 28 (See page 244).
– If only the bottom (yellow) light is on, go to step 22 (See page 243).
– If both lights are off, go to step 23 (See page 243).
– If both lights are on, continue with the next step.
20. The tester is in the self-test mode. Check the position of the selector switch.
v If the selector switch is not in the correct position, go to step 19 (See page 242).
v If the selector switch is already in the correct position, the port tester is not working correctly.
Exchange the port tester, and go to step 17 (See page 242).
21.
The cable you are testing has an open shield.
Note: The open shield can be checked only on the cable from the twinaxial workstation attachment to
the device or from device to device. Only one section of cable can be checked at a time. See the
SA41-3136, Port Tester Use information.
This
ends the procedure.
22. The cable network is bad. The wires in the cable between the console and the twinaxial workstation
attachment are reversed. Go to step 27 (See page 244).
23. Perform the following:
a. Find the twinaxial workstation attachment to which the failing console is attached.
b. Disconnect the cable from port 0 on that twinaxial workstation attachment.
c. Connect the port tester to port 0 on the attachment.
d. Set the selector switch on the port tester to the left (1) position.
24. Perform the following:
a. Press and hold the test switch on the port tester for 15 seconds and observe the lights.
b. If the port tester has three lights, do the following:
v If both the top (green) and center (yellow) lights are on, continue with step 25 (See page 244).
Note: The center (yellow) light is always on for twisted pair cable and may be on for fiber
optical cable.
v If only the bottom (yellow) light is on, continue with step 25 (See page 244).
v If all lights are off, continue with step 25 (See page 244).
v If only the top (green) light is on, go to step 27 (See page 244).
v If all lights are on, go to step 26 (See page 244).
c. If the port tester has two lights, do the following:
v If only the top (green) light is on, go to step 27 (See page 244).
v If only the bottom (yellow) light is on, continue with step 25 (See page 244).
v If both lights are off, continue with step 25 (See page 244).
v If both lights are on, go to step 26 (See page 244).
Analyze hardware problems 243

IBM iSeries 800 Specifications

General

Brand	IBM
Model	iSeries 800
Category	Server
Language	English