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Step 1540-37
The primary I/O Drawer is the only I/O Drawer that was connected to the CEC drawer.
Perform the following steps to isolate a faulty RIO cable:
Note: Before continuing, check the cabling from the CEC drawer to I/O Drawer(s) to
1. Turn the system power off.
2. At the CEC drawer, disconnect the cable connection at RIO port 0.
3. At the primary I/O drawer, disconnect the cable connection at RIO port 0. The RIO
cable that was connected to RIO port 0 should now be loose and can be removed.
4. At the CEC drawer, disconnect the cable connection at RIO port 1 and reconnect to
RIO port 0.
5. At the primary I/O drawer, disconnect the RIO connection at RIO port 1. Reconnect
this RIO cable end to RIO port 0.
6. Verify that primary I/O drawer RIO port 0 is connected to the CEC drawer RIO port
0.
7. Turn on the power to boot standalone diagnostics from CD.
Did the Please define the System Console screen display and are all attached
devices and adapters listed?
NO
YES
136
Service Guide
ensure that the system is cabled correctly. Refer to "Cabling the CEC Drawer,
Primary I/O Drawer and Secondary I/O Drawer(s)" on page 41 for valid
configurations. Record the current cabling configuration and then continue with
the following steps.
Go to "Step 1540-15" on page 124
The RIO cable that was removed in step 3 above is defective. Replace the
RIO cable. Connect the new RIO cable from CEC drawer RIO port 1 to the
primary I/O drawer RIO port 1. Reconfigure the system to its original condition.
Go to "MAP 410: Repair Checkout" in Diagnostics Information for Multiple Bus
Systems .
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