Universal Serial Bus (Usb) Port Problems; Solving Power Problems - IBM x3100 M5 Type 5457 Installation And Service Manual

Universal Serial Bus (USB) port problems

Table 29. Universal Serial Bus (USB) port problems and actions
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v If an action step is preceded by "(Trained technician only)", that step must be performed only by a trained
technician.
v Go to the IBM support website at http://www.ibm.com/supportportal to check for technical information, hints,
tips, and new device drivers or to submit a request for information.
Symptom
A USB device does not work.

Solving power problems

Use this information to solve power problems.
About this task
Power problems can be difficult to solve. For example, a short circuit can exist
anywhere on any of the power distribution buses. Usually, a short circuit will
cause the power subsystem to shut down because of an overcurrent condition. To
diagnose a power problem, use the following general procedure:
Procedure
1. Turn off the server and disconnect all power cords.
2. Check for loose cables in the power subsystem. Also check for short circuits, for
3. Check the lit LEDs on the light path diagnostics (see "Light path diagnostics"
4. Remove the adapters and disconnect the cables and power cords to all internal
5. Reconnect all ac power cords and turn on the server. If the server starts
What to do next
If the server does not start from the minimum configuration, see "Power-supply
LEDs" on page 129 to replace the components in the minimum configuration one
at a time until the problem is isolated.
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System x3100 M5 Type 5457: Installation and Service Guide
Action
1. Make sure that:
v The correct USB device driver is installed.
v The operating system supports USB devices.
2. Make sure that the USB configuration options are set correctly in the Setup
utility (see "Using the Setup utility" on page 98 for more information).
3. If you are using a USB hub, disconnect the USB device from the hub and
connect it directly to the server.
example, if a loose screw is causing a short circuit on a circuit board.
on page 126).
and external devices until the server is at the minimum configuration that is
required for the server to start (see "Solving undetermined problems" on page
158).
successfully, reseat the adapters and devices one at a time until the problem is
isolated.