Lenovo System x3250 M4 - Page 210

Step3.Gentlylowertheheatsinkonthemicroprocessor.
Step4.Alignthescrewholesontheheatsinkwiththeholesonthesystemboard.
System board
Heat sink
Step5.Installtheheatsinkonthemicroprocessor.
Attention:Donottouchthethermalmaterialonthebottomoftheheatsink.Touchingthethermal
materialwillcontaminateit.Ifthethermalmaterialonthemicroprocessororheatsinkbecomes
contaminated,contactyourservicetechnician.
a.Makesurethatthethermalmaterialisstillonthebottomoftheheatsink;then,aligntheheat
sinksothatthearrowsonthelabelpointtowardtheDIMMsandplacetheheatsinkontopof
themicroprocessor,thermalmaterialsidedown.
b.Alignthescrewsontheheatsinkwiththescrewholesonthesystemboard.
c.Tightenthescrewswithascrewdriver,alternatingamongthescrewsuntiltheyaretight.If
possible,eachscrewshouldberotatedtwofullrotationsatatime.Repeatuntilthescrewsare
tight.Donotovertightenthescrewsbyusingexcessiveforce.
Attention:Whenthetwoscrewsthatareclosertotherearoftheserveraretightened,the
screwheadsarenotlevelwiththesurfaceoftheheatsink.Donotovertightenthescrews
byusingexcessiveforce.
Step6.Reinstalltheairbaffleifitwasremovedbefore(see“Replacingtheairbaffle”onpage135).
Step7.Reinstallthecover(see“Replacingthecover”onpage132).
196LenovoSystemx3250M4InstallationandServiceGuide