Universal Serial Bus (Usb) Port Problems; Video Problems; Light Path Diagnostics - IBM 8863 - eServer xSeries 366 Service Manual

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 3, "Parts listing, Type 8863," on page 93 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 41.

Light path diagnostics

Light path diagnostics provides a path that you can follow to help you identify the
source of an error. The server must be connected to a power source for the LEDs
inside the server to be lit; the server does not have to be turned on for the LEDs to
be lit.
Press the reset button to reset the server and run the power-on self-test (POST).
You might have to use a pen or the end of a straightened paper clip to press the
button.
The server is designed so that LEDs remain lit when the server is connected to an
ac power source but is not turned on, provided that the power supply is operating
correctly. This feature helps you to isolate the problem when the operating system
is shut down.
Any PCI-X, memory, microprocessor, and VRM LED can be lit again without ac
power after you remove the microprocessor tray so that you can isolate a problem.
After ac power has been removed from the server, power remains available to
these LEDs for up to 24 hours.
To view the PCI-X, memory, microprocessor, and VRM LEDs, press and hold the
light-path-diagnostics button on the PCI-X board, memory card, or microprocessor
board for 30 seconds to light the error LEDs.
The LEDs that were lit while the server was running will be lit again while the button
is pressed.
48
IBM xSeries 366 Type 8863: Problem Determination and Service Guide
Action
1. Run USB diagnostics (see "Running the on-board diagnostic programs" on
page 58).
2. Make sure that:
v The correct USB device driver is installed.
v The operating system supports USB devices.
3. If a standard PS/2 keyboard or mouse is connected, any USB keyboard or
mouse will not work during POST.
4. 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).
5. If you are using a USB hub, disconnect the USB device from the hub and
connect it directly to the server.