Important service information
17
Usethefollowingstrategytopreventunnecessaryexpenseforreplacingand
servicingFRUs:
IfyouareinstructedtoreplaceanFRU,butthereplacementdoesnotsolve
theproblem,reinstalltheoriginalFRUbeforeyoucontinue.
Somecomputershavebothaprocessorboardandasystemboard.Ifyouare
instructedtoreplaceeitherofthem,andreplacingoneofthemdoesnotsolve
theproblem,reinstallthatboard,andthenreplacetheotherone.
IfanadapteroradeviceconsistsofmorethanoneFRU,anyoftheFRUsmay
bethecauseoftheerror.Beforereplacingtheadapterordevice,removethe
FRUsonebyonetoseeifthesymptomschange.ReplaceonlytheFRUthat
changedthesymptoms.
Attention:Thesetupconfigurationonthecomputeryouareservicingmayhave
beencustomized.RunningAutomaticConfigurationmayalterthesettings.Note
thecurrentconfigurationsettings(usingtheViewConfigurationoption);then,
whenservicehasbeencompleted,verifythatthosesettingsremainineffect.

Important notice for replacing a system board

Somecomponentsmountedonasystemboardareverysensitive.Improper
handlingcancausedamagetothosecomponents,andmaycauseasystem
malfunction.
Attention:Whenhandlingasystemboard:
Donotdropthesystemboardorapplyanyexcessiveforcetoit.
Avoidroughhandlingofanykind.
Avoidbendingthesystemboardandhardpu shingtopreventcrackingat
eachBGA(BallGridArray)chipset.