IBM x3500 - System - 7977 Installation Manual page 81

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 Problem Determination and Service Guide on the IBM System x Documentation CD 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
198 Microprocessors are not the same speed
289 A DIMM has been disabled by the system.
301, 303 Keyboard or keyboard controller error.
1604 Machine type mismatch detected
Action
Install microprocessor of the same speed.
Note: Do not mix dual-core and quad-core
processors in the same system.
1. Replace the lowest-numbered pair of DIMMs with
an identical known good pair of DIMMs; then,
restart the server. If the beep code error remains,
return one DIMM at a time from the failed pair to
its connector, restarting the server after each
DIMM, to identify the failed DIMM.
2. Make sure that the DIMM is installed correctly
(see "Installing a memory module" on page 11).
3. Reseat the DIMM.
4. Replace the DIMM.
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.
3. 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. Update the BIOS code and BMC firmware (see
the Problem Determination and Service Guide on
the IBM System x Documentation CD.
3. (Trained service technician only) Replace the
system board.
Chapter 5. Solving problems
67