IBM x3550 Problem Determination And Service Manual page 131

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 7978 and 1913 server," on page 29 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.
Error code Description
301 Keyboard or keyboard controller error.
303 Keyboard controller error.
762 Coprocessor configuration error.
11xx Serial port configuration error.
Action
1. If you have installed a USB keyboard, run the
Configuration/Setup Utility program and enable
keyboardless operation to prevent the POST error
message 301 from being displayed during startup.
2. Reseat the keyboard cable in the connector.
3. If you are using an external USB hub, disconnect
the keyboard from the hub and connect it directly
to the server.
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Keyboard
b. (Trained service technician only) System
board
1. If you have installed a USB keyboard, run the
Configuration/Setup Utility program and enable
keyboardless operation to prevent the POST error
message 301 from being displayed during startup.
2. Reseat the keyboard cable in the connector.
3. If you are using an external USB hub, disconnect
the keyboard from the hub and connect it directly
to the server.
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Keyboard
b. (Trained service technician only) System
board
1. Run the Configuration/Setup Utility program,
select Load Default Settings, and save the
settings.
2. Reseat the battery.
3. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. System-board battery
b. Microprocessor 1
1. Run the Configuration/Setup Utility program,
select Load Default Settings, and save the
settings.
2. (Trained service technician only) Replace the
system board.
113
Chapter 5. Diagnostics