Lenovo System x3550 M5 - Page 278

Step5.Locatethemicroprocessortoberemoved(see“System-boardinternalconnectors”onpage26).
Step6.Removetheheatsink.
Attention:Donottouchthethermalmaterialonthebottomoftheheatsink.Touchingthethermal
materialwillcontaminateit.Ifthethermalmaterialonthemicroprocessororheatsinkbecomes
contaminated,youmustwipeoffthecontaminatedthermalmaterialonthemicroprocessororheat
sinkwiththealcoholwipesandreapplycleanthermalgreasetotheheatsink.
a.Useascrewdrivertoloosenthecaptivescrewononesideoftheheatsinktobreaktheseal
withthemicroprocessor.
b.Loosenallthecaptivescrewsontheheatsink,rotatingeachscrewonefullturnuntileach
screwisloose.
c.Gentlylifttheheatsinkfromthemicroprocessor.Afterremoval,placetheheatsink(withthe
thermalgreasesideup)onaclean,flatsurface.
Heat sink
Figure192.Heatsinkremoval
Step7.Openthemicroprocessorsocketreleaseleversandretainer.
Microprocessor
release lever
Microprocessor
release lever
Figure193.Microprocessorsocketleversandretainerdisengagement
a.Identifywhichreleaseleverislabeledasthefirstreleaselevertoopenandopenit.
264LenovoSystemx3550M5InstallationandServiceGuide