v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v If an action step is preceded by “(Trained technician only),” that step must be performed only by a trained
technician.
v Go to the IBM support website at http://www.ibm.com/supportportal/ to check for technical information, hints,
tips, and new device drivers or to submit a request for information.
Diagnostic
code Message Description Action
I.18009 [I.18009] A core speed
mismatch has been detected for
one or more processor
packages.
Processors have mismatched
Core Speed.
1. Make sure that the microprocessor
is on the ServerProven website at
http://www.ibm.com/systems/
info/x86servers/serverproven/
compat/us/ .
2. Check the IBM support website
for an applicable retain tip or
firmware update that applies to
this problem.
3. (Trained technician only) Remove
and replace the affected
microprocessor (error LED is lit)
with a supported type (see
“Replacing a microprocessor and
heat sink” on page 349).
I.1800A [I.1800A] A mismatch has been
detected between the speed at
which a QPI link has trained
between two or more processor
packages.
Processors have mismatched
Bus Speed.
1. Make sure that the microprocessor
is on the ServerProven website at
http://www.ibm.com/systems/
info/x86servers/serverproven/
compat/us/ .
2. Check the IBM support website
for an applicable retain tip or
firmware update that applies to
this problem.
3. (Trained technician only) Remove
and replace the affected
microprocessor (error LED is lit)
with a supported type (see
“Replacing a microprocessor and
heat sink” on page 349).
I.1800B [I.1800B] A cache size mismatch
has been detected for one or
more processor packages.
Processors have one or more
cache levels with mismatched
size.
1. Make sure that the microprocessor
is on the ServerProven website at
http://www.ibm.com/systems/
info/x86servers/serverproven/
compat/us/ .
2. Check the IBM support website
for an applicable retain tip or
firmware update that applies to
this problem.
3. (Trained technician only) Remove
and replace the affected
microprocessor (error LED is lit)
with a supported type (see
“Replacing a microprocessor and
heat sink” on page 349).
Chapter 4. Troubleshooting 125