Introduction
This guide shows how to replace the Nook HD+ motherboard in 7 easy to understand steps. The tools needed to replace this piece of the Nook HD+ are the plastic opening tool, a T5 screwdriver, and tweezers.
No hazards are present in this guide, but be mindful of how rough the motherboard and ribbons are treated.
Tools
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            Open the plastic frame by wedging the plastic iFixit opening tool under the plastic frame to remove adhesive. 
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            Pop up all plastic tabs that secure the frame to the chassis. 
 
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            Remove twenty 5.0 mm Torx T5 screws that hold the chassis to the back casing using a screwdriver. 
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            Disconnect battery from motherboard. 
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            Remove back casing. 
 
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            Disconnect the small red and black ribbon connected to the speaker from the white clip on the motherboard. 
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            No tool is needed. Gently pull on the wires until the piece disconnects. 
 
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            Remove two 5.0 mm Torx T5 screws attached to the motherboard using a screwdriver. 
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            Lift the small foam piece attached to the black strip on the motherboard and gently pull up. 
 
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            With the black strip lifted, carefully snap the motherboard out of the plastic pieces holding it down. 
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            Remove the motherboard. 
 
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To reassemble your device, follow these instructions in reverse order.