IBM System x3300 M4, Installation And Service Manual

Page: 314 / 470

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, IBM System x3300 M4 Type 7382,” on page 303 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 Action
A USB device does not work.
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 115 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.
Video problems
See “Monitor and video problems” on page 286.
Solving power problems
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:
1. Turn off the server and disconnect all ac power cords.
2. Check for loose cables in the power subsystem. Also check for short circuits, for
example, if a loose screw is causing a short circuit on a circuit board.
3. If the Check-log LED on the operator information panel is lit, complete the
following steps:
v Check the IMM2 event log. To access the web interface, see “Logging on to
the Web interface” on page 127.
v
If a log indicates that there is a power rail failure, find the location of the
failed power rail on the power paddle card.
v
Disconnect the cables and power cords to all internal and external devices
(see Internal cable routing). Leave the power-supply cords connected.
v
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.
Table 20. Components associated with power rail error
Pwr rail error in the
IMM2 event log
Components
Pwr rail 1 error
1. For the hot-swap power-supplie systems: Fan 3, optional PCI
adapter at Slot 4, and other optional PCI adapters.
2.
For the fixed power-supplie systems: Fan 3, optional PCI
adapter at Slot 4, other optional PCI adapters, Hard disk
drives, and Optional DVD or Tape drive.
Pwr rail 2 error Fan 1, Fan 2, and Microprocessor 1
296
System x3300 M4 Type 7382: Installation and Service Guide