Specifications

Lenovo B50-30/B50-30 Touch/B50-45/ B50-70

Hardware Maintenance Manual

1130 System board

Foraccess,removetheseFRUs:

• “1010Batterypack”onpage33

• “1020Opticaldrive”onpage34

• “1030Bottomslotcover”onpage36

• “1040Harddiskdrive”onpage37

• “1050DIMM”onpage39

• “1060PCIExpressMiniCardforwirelessLAN/WAN”onpage40

• “1070Keyboard”onpage41

• “1080Keyboardbezel”onpage43

• “1110Ledboard”onpage48

Figure13.Removalstepsofsystemboard

Disconnectthespeakerconnectorinthedirectionbyarrow .

Important notices for handling the system board:

Whenhandlingthesystemboard,bearthefollowinginmind.

• Becarefulnottodropthesystemboardonabenchtopthathasahard

surface,suchasmetal,wood,orcomposite.

• Avoidroughhandlingofanykind.

• Inthewholeprocess,makesurenottodroporstackthesystemboard.

• Ifyouputasystemboarddown,makesuretoputitonlyonapadded

surfacesuchasanESDmatorconductivecorrugatedmaterial.