4. The service processor was unable to configure the modem(s) attached to the serial
port(s). Do the following:
a. Check the modem, modem cable, and serial port for loose or unconnected
cables. Reset the service processor using the pinhole reset switch on the
primary I/O drawer operator panel.
b. If the hang repeats, check with service support to see if there is a firmware
update that fixes the problem.
c. If there is not, or the update does not fix the problem, replace the following
FRUs one at a time in this order:
1) Modem cable
2) Modem
3) I/O backplane in the primary I/O drawer
d. If this procedure does not fix the problem, call service support.
146 Service Guide
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