Universal Serial Bus Device Problems - IBM IntelliStation M Pro 9229 Installation Manual

Universal Serial Bus device problems

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the parts listing in the Problem Determination and Service Guide 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
All or some keys on the USB
keyboard do not work.
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 M Pro Type 9229: Installation Guide
Action
1. If you have installed a USB keyboard, run the Configuration/Setup Utility
program and enable keyboardless operation to prevent the POST error
message 301 from being displayed during startup.
2. Make sure that the computer and the monitor are turned on.
3. If a USB hub is in use, disconnect the USB device from the hub and connect it
directly to the computer.
4. Replace the following components one at a time, in the order shown, restarting
the computer each time:
a. Keyboard
b. (Trained service technician only) System board
1. Make sure that:
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 on the computer to
protect it from damage when a USB device draws too much power. If this message
appears, contact the manufacturer of the USB device to see if a hardware upgrade
or fix is available for the USB device.