Chosen Solution
Hello all, I bought a used iPhone7 and have found that the sleep/wake button does not work. This means I can’t power the phone on or off with the button either. I replaced the power flex cable with spare flexes from two other phones and it still does not work. I took apart the power button assembly and made sure it was clean. The button makes a nice click when you press it and everything seems good to go. I’m doubtful that all 3 power flexes were bad. Could this be a problem with the logic board?
You can test the board with tweezers. Place one point of the tweezers on the pin 13 and the other point on the ground 19 or 20 leave on there for three seconds. If it doesn’t start booting you will need to check the BUTTON_POWER_KEY_CONN_L circuit and make sure it is getting 1V8 to it.
