Einleitung
This guide teaches you how to replace the motherboard in a Samsung NP300E5C laptop.
Werkzeuge
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            Push both tabs away from the center of the device. 
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            While both are in the fully unlocked position, slide the battery out. 
 
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            Remove this 4 mm Phillips #8 screw using a Phillips #00 screwdriver. 
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            Firmly, but gently pull the cover towards you. 
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            After moving the cover about 2 centimeters, you can lift and remove it. 
 
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            Remove these four 4 mm Phillips #8 screws using a Phillips #00 screwdriver. 
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            Gently lift the hard drive up, however do not remove it. 
 
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            Firmly grasp the base of the connector at the bottom of the hard drive. 
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            Gently pull the connector off to free the hard drive. 
 
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            Remove the thirteen Philips screws securing the base to the palmrest. 
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            Remove the screw securing the optical drive. 
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            Remove the two small Philips screws securing the base to the palmrest. 
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            Insert a spudger into the separation between the palmrest and the base, in the front of the laptop. 
 
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            Remove all connectors from the motherboard. 
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            Remove the screws securing the motherboard to the palmrest. 
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            Lift the motherboard out. Remove all components that are connected to the motherboard, such as the wireless card, RAM, CPU, and CPU cooler, to the replacement motherboard. You're done! 
 
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To reassemble your device, follow these instructions in reverse order.