IBM 7026-H80 - RS/6000 - 256 MB RAM Service Manual page 164

Service guide
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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
b. If the hang repeats, check with service support to see if there is a firmware
c. If there is not, or the update does not fix the problem, replace the following
d. If this procedure does not fix the problem, call service support.
146
Service Guide
cables. Reset the service processor using the pinhole reset switch on the
primary I/O drawer operator panel.
update that fixes the problem.
FRUs one at a time in this order:
1) Modem cable
2) Modem
3) I/O backplane in the primary I/O drawer

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