If the battery is completely drained, the phone may not respond immediately.
Go to product viewer dialog for this item. that won't power on, start with simple software and external hardware resets before moving to advanced board-level repairs. iphone-6-no-power-solution-100-working
Press and hold the Home button and the Power (Sleep/Wake) button simultaneously. If the battery is completely drained, the phone
Plug it in for at least 30–60 minutes before attempting another force restart. If the battery is completely drained
Keep holding both for at least 10–15 seconds until the Apple logo appears. 2. Check Charging Components