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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 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
A USB device does not work.
System-board error LEDs
The following illustration shows the LEDs on the system board. You might have to
refer to this illustration when you solve problems with the server.
Microprocessor
fan LED
Each error LED is lit to indicate a problem with a specific component. After a
problem is corrected, its LED will not be lit the next time the server is restarted; if
the problem remains, the LED will be lit again. See the Problem Determination and
Service Guide on the IBM System x Documentation CD for additional information.
60
System x3100 Type 4348: Installation 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
Configuration/Setup Utility program (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 server.
DIMM 1 LED
DIMM 2 LED
DIMM 3 LED
DIMM 4 LED
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