How to Fix iPhone 7 That Won’t Charge, Turns Off Randomly, or Is Stuck on Apple Logo

The iPhone 7 is still a reliable device for many users, but some have reported frustrating problems — like the phone randomly shutting down, refusing to charge, or freezing at the Apple logo. Here’s how to fix the most common iPhone 7 power-related issues.


iPhone 7 Won’t Charge or Turn On

Problem:
Your iPhone 7 died at 1%, and now it won’t charge or power back on — even after being plugged in for over an hour with a working Apple charger.

Solution:
This could be a case of a fully drained or dead battery. Lithium-ion batteries retain a bit of power even at 0%, and if the residual charge drains too fast, the phone may fail to wake up.

What to try:

  • Plug it into a certified Apple charger and let it sit undisturbed for at least 30–60 minutes.
  • Try a force restart while it’s charging:
    • Press and release Volume Up, then Volume Down, then hold the Side button.

If nothing works:

  • The battery may be dead and not accepting charge.
  • You’ll need to visit an Apple Store or repair center for a battery replacement.

iPhone 7 Turns Off When It Gets Warm

Problem:
Your iPhone 7 Plus randomly shuts off and reboots, especially when you’re not in an air-conditioned room. It runs fine when cold, but overheats quickly and becomes unusable.

Solution:
This is a sign of overheating — which can be due to either software bugs or a failing internal component.

Try this:

  1. Factory reset the device in a cool room (preferably AC):
    • Go to Settings → General → Transfer or Reset iPhone → Erase All Content and Settings.
  2. Don’t restore from a backup or install any apps — just test it clean.
  3. Use the phone normally for a few hours and see if it overheats again.

Two possible outcomes:

  • If the phone stays cool → It was likely a bad app or software bug.
  • If it still overheats and reboots → You’re looking at a hardware issue, possibly a damaged logic board.

In that case, contact Apple or use your insurance coverage for a repair or replacement.


iPhone 7 Not Turning On After Repair

Problem:
After trying resets, reassembly, and a factory restore, the iPhone flashes the Apple logo and powers off. It won’t boot on a DC power supply, and current draw is minimal.

Solution:
This is a hardware-level failure — likely involving the logic board or power management circuit.

What to do:

  • Since you have repair experience, check for:
    • Damaged or loose PMIC (power management chip).
    • Faulty battery connector, U2 IC, or baseband CPU.
  • If you don’t have board-level tools, bring it to a technician who can run micro-soldering diagnostics.

iPhone 7 Stuck on Apple Logo

Problem:
Your iPhone 7 gets stuck at the Apple logo screen. You’ve tried restore, DFU mode, changing cables and computers. After a reset, it briefly works, then goes back to the same problem.

Solution:
This sounds like an issue with corrupted firmware or a failing storage chip (NAND).

Start with:

  • DFU mode restore (again), but this time:
    • Don’t restore from a backup right away.
    • Set it up as new and test its behavior.

If the issue comes back after a full reset:

  • You likely have a hardware failure, possibly in the NAND, CPU, or logic board.

As a repair tech, start by checking NAND health and reflow if needed. If you’re not set up for board-level work, refer it out to a specialist.

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