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:
- Factory reset the device in a cool room (preferably AC):
- Go to Settings → General → Transfer or Reset iPhone → Erase All Content and Settings.
- Don’t restore from a backup or install any apps — just test it clean.
- 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.