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Universal Serial Bus (USB) port 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 Chapter 5, "Parts listing," on page 153 to check if a component is a consumable, structural, or FRU part.
v If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained
technician.
Symptom
A USB device does not work.
Video problems
See "Monitor and video problems" on page 138.
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. If the system-error LED on the system board is lit, complete the following
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System x3650 M4 BD Type 5466: 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 91 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.
steps:
a. Check the IMM2 event log. To access the web interface, see "Logging on to
the Web interface" on page 103.
b.
If a log indicates that there is a power rail failure, find the location of the
failed power rail on the system board.
c. Disconnect the cables and power cords to all internal and external devices
(see "Internal cable routing" on page 164). Leave the power-supply cords
connected.
d. Remove each component that is associated with the failed power
component, one at a time, restarting the server each time, until the cause of
the failure is identified.
e. Replace the identified component.
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Table of Contents
Troubleshooting
