Lenovo 5458 Installation And Service Manual page 421

3. If the previous steps do not resolve the problem, at
the next maintenance opportunity, replace the
affected DIMM (as indicated by LightPath and/or
failure log entry).
4. If PFA re-occurs on the same DIMM connector,
swap the other DIMMs on the same memory
channel one at a time to a different memory channel
or Processor. (check service information for this
product/Install guide for population requirements
for sparing/paring modes). If PFA follows a moved
DIMM to any DIMM connector on the different
memory channel, replace the moved DIMM.
5. Check IBM Support website for an applicable
Service Bulletins (Service bulletins) that applies to
this memory error. (Link to IBM support service
bulletins)
(Trained service technician only) If problem
6.
continues to re-occur on the same DIMM connector,
inspect DIMM connector for foreign material and
remove, if found. If connector is damaged, replace
system board.
7. (Trained service technician only) Remove affected
Processor and inspect Processor socket pins for
damaged or mis-aligned pins. If damage is found or
Processor is an upgrade part, replace system board.
8. (Trained service technician only) Replace affected
processor.
9. (Trained service technician only) Replace system
board.
W.68002 [W.68002] A CMOS battery error has
been detected
Explanation: CMOS Battery Fault
Severity: Warning
User response: Complete the following steps:
1. If the system was recently Installed, Moved, or
Serviced, makesure the batter is properly seated.
2. Check IBM Support website for an applicable
service bulletin or firmware update that applies to
this error.
3. Replace CMOS Battery
4. (Trained service technician only) Replace the
system board.
Appendix B. UEFI (POST) error codes
W.68002
405