How to Fix iPhone 7 Not Turning On (Boot Loop, Stuck Apple Logo, Battery Issues)

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If your iPhone 7 won’t turn on, is stuck in a boot loop, or constantly shows the Apple logo and black screen, you’re not alone. These power and boot issues can be incredibly frustrating, especially when they happen out of nowhere. This guide covers real-world cases and step-by-step solutions to help you get your iPhone 7 working again.

iPhone 7 Stuck in Boot Loop After Screen and Battery Replacement

Problem:
Ryan had his iPhone 7 screen and battery replaced at a repair shop. Afterward, the battery percentage started behaving oddly — jumping up and down rapidly. Typing became glitchy, and eventually, the phone got stuck in a constant Apple logo boot loop.

Solution:
This is clearly a hardware problem caused during the repair. Most likely culprits:

  • Faulty or incompatible battery or screen replacement.
  • Poor internal connections during the repair process.
  • Use of non-Apple certified parts.

Here’s what you should do:

  • Return to the repair shop and demand a proper fix. They caused the issue and need to make it right.
  • Avoid attempting more DIY fixes unless you’re experienced — you could make it worse.
  • In the future, always choose an Apple Store or certified repair center to avoid untrained technicians using low-quality parts.

If the technician restores booting ability but battery issues remain, recalibrate the battery:

  1. Drain the battery until the iPhone powers off.
  2. Charge it uninterrupted to 100% and leave it plugged in for 2 more hours.
  3. Force restart the iPhone (Hold Power + Volume Down until the Apple logo appears).
  4. Repeat the full cycle one more time.

You can also factory reset after the hardware is fixed to reset any corrupted system settings:

  • Settings → General → Reset → Erase All Content and Settings.

iPhone 7 Stuck at Apple Logo, Won’t Boot (No Drops or Water Damage)

Problem:
Ryanepeak’s iPhone 7 randomly got stuck on the Apple logo, endlessly looping without any recent damage, drops, or liquid exposure. Multiple force restarts and hours of charging didn’t help.

Solution:
This is a classic case of a No Boot issue, not a No Power problem.
The best fix you can try at home is a DFU Restore. Here’s how:

  1. Update iTunes on your computer to the latest version.
  2. Turn off your iPhone completely.
  3. Connect your iPhone to your computer using a Lightning cable.
  4. Enter DFU Mode:
    • Hold the Power button for 3 seconds.
    • Keep holding Power and now press the Volume Down button for 10 seconds.
    • Release the Power button but continue holding Volume Down for another 5 seconds.
    • The screen should stay completely black — if the Apple logo shows, you did it wrong and need to try again.
  5. iTunes (or Finder on MacOS Catalina or later) should detect an iPhone in recovery mode.
  6. Follow the prompts to Restore the iPhone.

⚠️ Important: A DFU Restore will erase all data on your iPhone. If you have a backup, you’ll be able to restore it afterward.

If DFU Restore fails or the iPhone remains stuck, it’s most likely a hardware failure — like NAND flash storage corruption or motherboard issue.

  • In that case, you’ll need to take it to Apple Support or a trusted repair center.

Final Tip: How to Tell If It’s a Hardware Issue

Here’s a simple cheat sheet:

  • Stuck on Apple logo + screen flashes or glitches = Hardware damage likely.
  • iPhone recognized by computer but won’t boot = Software corruption likely.
  • No power at all (no vibration, no screen activity, no iTunes detection) = Dead battery or major internal damage.

When in doubt, starting with a DFU Restore is safe. If it doesn’t work, seek professional help — especially before traveling or relying on your phone.

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