Optional-device problems
This topic provides a list of symptoms and suggestions for resolving problems
with optional devices.
About this task
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See Chapter 4, “Parts listing, Types 7145, 7146, 7143, and 7191,” on page 81 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Symptom Action
An IBM optional device that
was just installed does not
work.
1. Make sure that:
v The device is designed for the server (see ).
v You followed the installation instructions that came with the device and the
device is installed correctly.
v You have not loosened any other installed devices or cables.
v You updated the configuration information in the Setup utility. Whenever
memory or any other device is changed, you must update the configuration.
2. Reseat the device that you just installed.
3. Replace the device that you just installed.
An IBM optional device that
used to work does not work
now.
1. Make sure that all of the hardware and cable connections for the device are
secure.
2. If the device comes with test instructions, use those instructions to test the
device.
3. If the failing device is a SCSI device, make sure that:
v The cables for all external SCSI devices are connected correctly.
v The last device in each SCSI chain, or the end of the SCSI cable, is
terminated correctly.
v Any external SCSI device is turned on. You must turn on an external SCSI
device before turning on the server.
4. Reseat the failing device.
5. Replace the failing device.
POST reports the following PCI
event: Redundant PCI Host
Bridge IB Link Failed. Slot
Number = NA. Bus Number =
NA.Device ID = 0xffff. Vendor
ID = 0xffff
1. Check for bent pins between the I/O-board shuttle and the microprocessor
board.
2. Replace the failing device.
52 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
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