Chosen Solution
This phone was not being used for about a month. All that month the phone was charging and now it wont turn on. I replaced the battery, dock connector and Screen and it still doesn’t work what do i do.
First try a hard reset: Press and hold both the Home and the Top (or Side) buttons for at least 10 seconds, until you see the Apple logo. If that doesn’t work, try rebooting into recovery mode with iTunes on a computer: Press and hold the Sleep/Wake and Home buttons simultaneously.Keep holding both buttons and do not release when the Apple logo appears.Wait for the Recovery mode screen to display and then release both buttons.