Introduction
This guide shows how to fully disassemble a Garmin Nuvi 1200 to replace the logic board.
Tools
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            Remove to sticker on the back of the unit and then remove the two T5 scremws once this is done use a spudger to carefully pry off the silver cover. 
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            Once the tool is inserted it can slide around the entire device. 
 
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            Lift cover off of unit. 
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            Be careful not to lose small rubber piece on the bottom right corner. 
 
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            Gently lift the logic board out of the unit 
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            Be careful not to damage the battery connector on the top of the unit. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.