Chosen Solution
i have an iphone 6 and if you put it on the table and don’t use it for about 20mins than it goes dead only way to wake it up is to hard reboot (power button + home button) if you use it nonstop it works perfectly i have changed the battery and all the components (cameras, wifi antenna, lcd) still the same problem
hmm. this looks like it could be board damage. Try taking it to a repair shop that does micro soldering . They have a microscope to look at your MotherBoard . You stated you replaced all the components . The only one you didn’t replace was the board. Try that and keep the rest of us in the loop with your progress! Happy fixing!
