iPhone 16 Pro Max Power Button Flex Cable

A drop onto the right-hand edge of an iPhone 16 Pro Max can damage the side button flex even when the frame looks fine. The impact travels through the button cap into the switch, and the result is a button that's dead, sticky or only works sometimes.

This aftermarket power button flex cable fits the iPhone 16 Pro Max and replaces the switch and cable behind the side button. The listing doesn't say whether other buttons are on this flex.

What to check, and when to replace

Inspect the frame near the button for dents that could press on the cap; a dent can hold the switch half-pressed and cause the same fault without anything wrong inside. Test the button without a case. If the cap moves freely and the phone still ignores presses, misses double-clicks or responds only to hard pushes, the switch is the likely problem. Liquid damage and a cable torn during an earlier repair cause similar faults.

The flex is glued in, so warm it gently and lift it slowly, keeping clear of nearby cables.

Test lock, wake, Siri and the double-click for Apple Pay after fitting. A clean response on each means the job is done.