Lenovo System x3550 M5 Installation And Service Manual page 941

4. (Trained Service technician only) Replace the Processor. Inspect Processor socket and replace
the system board first if socket is damaged
• I.1800C A cache type mismatch has been detected for one or more processor packages.
Processors have one or more cache levels with mismatched type
Explanation:
Severity
Error
User Response
Complete the following steps:
1. Verify that matching processors are installed in the correct processor sockets. Correct any
mismatch found.
2. Check the Lenovo support site for an applicable service bulletin or firmware update that applies
to this processor error.
3. (Trained technician only)Replace the system board
• I.1800D A cache associativity mismatch has been detected for one or more processor packages.
Processors have one or more cache levels with mismatched associativity
Explanation:
Severity
Error
User Response
Complete the following steps:
1. Verify that matching processors are installed in the correct processor sockets. Correct any
mismatch found.
2. Check the Lenovo support site for an applicable service bulletin or firmware update that applies
to this processor error.
3. (Trained technician only)Replace the system board
• I.1800E A processor model mismatch has been detected for one or more processor packages.
Processors have mismatched Model Number
Explanation:
Severity
Error
User Response
Complete the following steps:
1. Verify that matching processors are installed in the correct processor sockets. Correct any
mismatch found.
2. Check the Lenovo support site for an applicable service bulletin or firmware update that applies
to this Processor error.
3. (Trained technician only)Replace the system board
Appendix B. UEFI/POST diagnostic codes
927