Universal Serial Bus (Usb) Device Problems; Video Problems; System-Board Leds - IBM x3250 M2 Problem Determination And Service Manual

Universal Serial Bus (USB) 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 Chapter 3, "Parts listing, Types 4190, 4191 and 4194 server," on page 31 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.

Video problems

See "Monitor problems" on page 120.

System-board LEDs

The system board has error LEDs for the fans, voltage regulator, and memory that
help to locate the source of an error. When an error LED is lit, run the diagnostic
programs (see "Diagnostic programs and messages" on page 128) to find the cause
of the error.
Many errors are first indicated by a lit information LED or system-error LED on the
operator information panel on the front of the server. If one or both of these LEDs
are lit, one or more LEDs on the system board might also be lit and can direct you
to the source of the error.
See the illustration in step 7 on page 127 for the locations of the LEDs on the
system board.
Before you look inside the server to view error LEDs or status LEDs, read the
safety information that begins on page vii and "Handling static-sensitive devices" on
page 49.
If an error occurs, view the system LEDs in the following order:
1. Check the operator information panel on the front of the server. If the
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IBM System x3250 M2 Types 4190, 4191 and 4194: Problem Determination 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
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 the device directly to the server.
system-error LED is lit, it indicates that an error has occurred; go to step 2 on
page 127.
The following illustration shows the operator information panel.