Lenovo M490s notebook User Manual Page 65

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1150Systemboardassembly
Foraccess,removetheseFRUsinorder:
“1010Batterypack”onpage42
“1020Bottomslotcover”onpage42
“1030Memorymodules”onpage43
“1040Harddiskdriveassembly”onpage45
“1050PCIExpressMiniCardforwirelessLAN”onpage46
“1060mSATAsolid-statedrive”onpage47
“1070Backupbattery”onpage48
“1080Basecover”onpage49
“1110Fingerprintboardbracketandngerprintboard”onpage52
“1120Thermalmoduleassembly”onpage54
Importantnoticeforreplacingthesystemboard
Whenreplacingthesystemboard,observethefollowingguidelines:
Donotdropasystemboardonabenchtopthathasahardsurface,suchasmetal,wood,orcomposite.
Donotapplyanyexcessiveforcetoasystemboard.
Avoidroughhandlingofanykind.
AvoidbendingasystemboardorhardpushingtopreventcrackingateachBallGridArray(BGA)chipset.
Whenyouputasystemboarddown,besuretoputitonlyonapaddedsurfacesuchasanESDmat
oracorrugatedconductivesurface.
Locatingmajorsensitivecomponentsonthesystemboard
Attention:Thefollowingcomponentsmountedonasystemboardareextremelysensitive.Improper
handlingofasystemboardcancausedamagetothefollowingcomponents,andmightcauseasystem
malfunction.Whenyouservicethesystemboard,avoidanykindofroughhandling.
aPlatformControllerHub(PCH)
bMicroprocessor
cGraphicschip(fordiscretegraphicsmodels)
Formodelswithanintegratedthermalmoduleassembly
a
b
Chapter8.RemovingorreplacingaFRU59
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