Introduction
The trackpad replacement for the Acer Chromebook C740 requires removing the back panel, removing the battery, unplugging a ribbon cable, and removing several screws.
Tools
Parts
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            Place the chromebook bottom side up on a flat surface. 
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            Remove the thirteen 7 mm screws with a Phillips #0 screwdriver. 
 
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            Insert the plastic opening tool into the slit near the hinges and pry upwards to lift the back panel. 
 
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            Unplug the white 8-wire battery connector from the motherboard by using a spudger to push the two L-shaped indentations towards the battery. 
 
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            Pull the black wire out from under the the black center clips and up from the gray outer clips with a spudger. 
 
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            Use a spudger to lift the black clip on the small purple ribbon cable connector to the left of the touchpad. 
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            Pull the ribbon cable out from the connector. 
 
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To reassemble your device, follow these instructions in reverse order.