IBM 9228 - IntelliStation Z - Pro Service Manual page 136

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 3, "Parts listing, Type 9228 and 9232," on page 19 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
The USB mouse or USB
pointing device does not work.
A USB device does not work.
A message such as Power
surge on Port USB or A USB
device has exceeded the
limits of its hub port is
displayed on Windows operating
systems.
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IBM IntelliStation Z Pro Type 9228 and 9232: Problem Determination and Service Guide
Action
1. Make sure that:
v The mouse is compatible with the computer. See http://www.ibm.com/
servers/eserver/serverproven/compat/us/iserver.html/.
v The mouse or pointing-device USB cable is securely connected to the
computer.
v The mouse or pointing device drivers are installed correctly.
v Keyboardless operation has been enabled in the Configuration/Setup Utility
program.
2. If a USB hub is in use, disconnect the USB device from the hub and connect it
directly to the computer.
3. Replace the following components one at a time, in the order shown, restarting
the computer each time:
a. Mouse or pointing device
b. (Trained service technician only) System board
1. Make sure that:
v The correct USB device driver is installed.
v The operating system supports USB devices.
v A standard PS/2 keyboard or mouse is not connected to the computer. If it
is, a USB keyboard or mouse will not work during POST.
2. Make sure that the USB configuration options are set correctly in the
Configuration/Setup Utility program menu (see the User's Guide for more
information).
3. If you are using a USB hub, disconnect the USB device from the hub and
connect it directly to the computer.
This message indicates that a safety feature has been enabled in the computer to
protect it from damage when a USB device draws too much power. Contact the
manufacturer of the USB device to see whether a hardware upgrade or fix is
available for the USB device.