The button on the device's back may sometimes become damaged or dirty and therefore need replacement. This guide will go over how to access the back button's contact in order to clean or replace.
Using the Triangle driver remove the four 7.5 mm screws.
Turn the device so that the the device is on its side.
Hold the back and belly on the device and gently pull apart.
With insides exposed, grab leg and gently pull up and away from the body to detach them. Repeat for all legs needed.
Locate the gray rubber contact in the middle of the bottom half of the device. Using the spudger, lift one corner of the contact until it pops loose.
Grab the contact and gently pull until the other side detaches.