iPhone 7 Won’t Turn On, Charge, or Update? Here’s What You Can Do

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If your iPhone 7 won’t power on, charge, or respond after a reset or software update, you’re not alone. From unresponsive batteries and update failures to post-water exposure glitches, these issues can be frustrating—especially when you rely on your phone daily. This guide walks you through key scenarios and fixes that can help you bring your iPhone 7 back to life (or know when it’s time for a repair).

Issue #1: iPhone 7 Won’t Turn On After Sitting Unused for Days

Possible Cause: A deeply discharged battery that’s lost its residual charge.

Fixes to Try:

  • Plug the iPhone into a computer USB port, not a wall charger, and leave it for 30–60 minutes
  • Try a different Lightning cable and wall adapter
  • If it heats up but still won’t boot, the battery may be completely discharged and will likely need replacement

🔧 If none of these work, it’s time to book a repair with Apple.

Issue #2: iPhone 7 Overheats and Won’t Charge or Boot After an Update

Possible Cause: A bug in the iOS update or battery/power management issue

Fixes to Try:

  • Check your charger and cable using a different set
  • Leave the phone plugged in for at least 30 minutes
  • Inspect the charging port for lint or damage using a flashlight
  • Try charging from a computer USB port instead of the wall
  • Attempt a DFU Mode Restore using iTunes or Finder (see instructions below)

💡 If all else fails, a battery or logic board issue may be to blame. Contact Apple.

Issue #3: iPhone 7 Got Wet and Won’t Charge

Possible Cause: Moisture in the Lightning port

Fixes to Try:

  • Turn the phone off immediately
  • Wipe it down with a soft, dry cloth
  • Shake out moisture from the charging port by tapping it gently with the port facing down
  • Let it air dry in a ventilated area for 12–24 hours
  • If still wet, blow gently using cool air or a low-heat hair dryer (not hot)
  • Don’t plug it in until the port is completely dry

⚠️ If damage persists, schedule a repair at the Genius Bar or an authorized service provider

Issue #4: iPhone 7 Won’t Update, Stuck in DFU Mode or Apple Logo Loop

Possible Cause: Failed software update or system corruption

Fixes to Try:

  • Try restoring your iPhone via DFU Mode

How to Enter DFU Mode on iPhone 7:

  1. Connect to your computer and open iTunes (Windows) or Finder (macOS)
  2. Press and hold the Power + Volume Down buttons for 10 seconds
  3. Release Power, but keep holding Volume Down for another 5 seconds
  4. The screen should remain black, and your computer should detect the iPhone in recovery mode
  5. Follow the on-screen steps to Restore

❗If DFU fails or you see error messages repeatedly, Apple support is your next step.

When to Contact Apple

If your iPhone:

  • Doesn’t respond after all troubleshooting
  • Shows no signs of life after long charging
  • Can’t update or restore via DFU mode
  • Has visible water or physical damage

Then it’s time to call Apple Support or visit an Apple Store.

You may be eligible for:

  • Battery replacement
  • Device repair or swap
  • Warranty service or AppleCare+ support

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