Introduction
In this step-by-step guide, you will be able to successfully replace your motherboard in your LG Optimus F3 device.
Tools
Parts
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            Turn the device so that the back faces up. 
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            Remove the back case by pushing up on the back and pulling down on the face as illustrated in the image. 
 
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            Use the plastic opening tool to separate the inner case from the device. 
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            Wedge the plastic opening tool between the case. 
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            Wiggle the tool and use leverage to pry the case apart. 
 
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            Use the plastic opening tool to separate the camera from the motherboard. 
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            Wedge the plastic tool between the camera and the motherboard to loosen the camera unit. 
 
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            Use the plastic opening tool to separate the sim card and the memory card connector from the motherboard. 
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            Wedge the plastic tool to lift up the sim-memory unit from the motherboard. 
 
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            Use the plastic opening tool to remove the charging port unit. 
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            Wedge the plastic opening tool between the charging port unit and the motherboard to separate the port. 
 
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            Use the plastic opening tool to remove the motherboard located directly above the battery encasement. 
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            Wedge the plastic opening tool between the circuit board and the motherboard to separate the unit. 
 
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To reassemble your device, follow these instructions in reverse order.