IBM LS20 - BladeCenter - 8850 Service Manual page 35

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 8850," on page 53 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.
602 Invalid diskette boot record.
604 Diskette drive 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.
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 assembly
(Trained service technician only) Replace the system
board assembly.
1. Remove and reinsert the diskette, and restart the
server; or restart the server using another
bootable diskette.
2. Reseat the following components:
a. Diskette drive
b. Diskette drive cable
3. Replace the following components one at a time,
in the order shown, restarting the server each
time.
a. Diskette drive
b. Diskette drive cable
c. (Trained service technician only) System
board assembly
1. Run the Configuration/Setup Utility program.
2. Reseat the following components:
a. Diskette drive
b. Diskette drive cable
3. Replace the following components one at a time,
in the order shown, restarting the server each
time.
a. Diskette drive
b. Diskette drive cable
c. (Trained service technician only) System
board assembly
21
Chapter 2. Diagnostics