Step 1540-38
If boot is unsuccessful, turn off the power and replace the remaining parts, (listed in the
following table) in this drawer, one at a time. Turn on the power and check for a
successful boot.
Symptom Action
You have been directed to MAP 1540 by the
SRC tables and the SRC is B4xx2470,
B4xx4470, or B4xx6470.
1. I/O planar
You have been directed to MAP 1540 by the
SRC tables and the SRC is NOT B4xx2470,
B4xx4470, or B4xx6470.
1. I/O planar
2. Drawer indicator panel
3. Fan monitoring card
4. Both power supplies
5. Power distribution board.
Was the boot successful?
No Reinstall the next part in the list and return to the beginning of this step.
Continue repeating this process until a part causes the boot to be successful.
If you have replaced all the items listed above and the boot is not successful,
check any external devices and cabling. If you do not find a problem, contact
your next level of support for assistance.
Yes Go to “Step 1540-39”.
Step 1540-39
If the boot is successful:
1. Turn off the power.
2. The item just replaced has fixed the problem.
3. Plug in all adapters that were previously removed but not reinstalled.
4. Reconnect the I/O drawer ac cables that were previously disconnected. Ensure the
circuit breakers are set to the On position.
Reconfigure the system to its original condition. Go to “Map 0410: Repair Checkout” in
the Diagnostic Information for Multiple Bus Systems.
132 Service Guide
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