Lenovo Personal Computer 4155 User Manual download pdf (Page 144)

6.Routethecableforthenewpowerswitch/LEDassemblythroughtheholeinthechassisandtothe

systemboard.

7.Installthenewpowerswitch/LEDassemblyintothebezel.MakesurethattheLEDsareinthecorrect

position.

8.Connectthepowerswitch/LEDcabletothesystemboard.

9.Reinstallthefrontbezel.

10.Goto“CompletingtheFRUreplacement”onpage138.

Replacingthebattery

Attention

Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”

intheThinkStationSafetyandWarrantyGuidethatcamewithyourcomputer.ToobtainacopyoftheThinkStation

SafetyandWarrantyGuide,goto:

http://www.lenovo.com/support.

Yourcomputerhasaspecialtypeofmemorythatmaintainsthedate,time,andsettingsforbuilt-infeatures,

suchasserial-portassignments(conguration).Abatterykeepsthisinformationactivewhenyouturn

offthecomputer.

Thebatterynormallyrequiresnochargingormaintenancethroughoutitslife;however,nobatterylasts

forever.Ifthebatteryfails,thedate,time,andcongurationinformation(includingpasswords)arelost.An

errormessageisdisplayedwhenyouturnonthecomputer.

Refertothe"Lithiumbatterynotice"intheThinkStationSafetyandWarrantyGuideforinformationabout

replacinganddisposingofthebattery.

Toreplacethebattery:

1.Turnoffthecomputeranddisconnectthepowercordfromtheelectricaloutletandfromthecomputer.

2.Openthecomputercover.See“Removingthecover”onpage78.

3.Accessthesystemboard.

4.Locatethebattery.See“Locatingpartsonthesystemboard”onpage113.

5.Removetheoldbattery.

6.Installthenewbattery.

7.Replaceanyadaptercardthatwasremoved.Replacethecomputercoverandconnectthecables.See

“CompletingtheFRUreplacement”onpage108.

136ThinkStationHardwareMaintenanceManual

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Lenovo Personal Computer 4155 User Manual Page 144