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The wiring of your motherboard may have been disconnected causing the screen o not function properly. This guide will help you fix that.
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Remove the (10) P58F black screws on the back cover using the Phillips #0 screwdriver.
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After removing the screws, remove the back cover using a plastic or metal spudger.
 
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Unscrew the (6) six black screws outlined using a Phillips #0 screwdriver.
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Unscrew (4) screws securing the fan using a Phillips #0 head screwdriver.
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Remove the fan from the motherboard.
 
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Unplug all wires from motherboard, including battery wire, speaker wire, screen wire, and other component wires.
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Remove the black speaker wire.
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Remove the white display wire.
 
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(Continued)Unplug all wires from motherboard, including battery wire, speaker wire, screen wire, and other component wires
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Remove the gold and silver display cables.
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Remove the white fan cable.
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Remove the USB-to-motherboard cable
 
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(Continued)Unplug all wires from motherboard, including battery wire, speaker wire, screen wire, and other component wires
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Remove the black battery cable.
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Remove the blue ribbon cable.
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Unscrew and remove hard drive/SSD.
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Disconnect the hard drive/SSD from the motherboard.
 
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Gently remove the motherboard from the device.
 
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.