What to do if iPhone 8 stops working after it was charged overnight (won't charge or turn on)

Many people usually leave their iPhones charged overnight and for most, this is not an issue. For some unfortunate few however, this same exact situation can be risky. In this short iPhone 8 troubleshooting article, find out why.

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Problem: iPhone 8 not working after it was charged overnight

Hi! My iPhone 8 appears to have stopped working randomly for no reason whatsoever.  I have not dropped it recently, it has not received any water damage of the kind. I went to sleep with it plugged into the charger since the battery was low and woke up to find it wouldn’t turn on, even while plugged in.  I held down the power button for over 10 seconds and it did not turn on. I then tried to press the volume bottom up and down and repeated the step. Nothing. I held down the power and home button as well to no avail. I plugged the iPhone into my laptop using two different cables- nothing. I don’t know what’s wrong with my phone and it’s really stressing me out.  I need my phone especially for work and I’d like if I could solve this without having to go all the way to an Apple store. Thanks in advance.

Solution: iPhones are designed to automatically stop charging once it’s full so it’s perfectly fine to leave connected to a charger overnight. However, there are some things that can’t be controlled that might create problems.

Battery was completely drained

The Li-Ion 1821 mAh battery of your iPhone 8 does not totally become empty. Technically, a tiny amount of power must still be present in the battery, even if the device battery indicator is 0%, in order to keep its circuits alive. Batteries need this small amount of power to recognize a new charging session. In some cases, the reserve power may be expended making the battery totally useless. While there are systems in place to prevent this from happening, it’s not perfect. The longer an empty battery is connected to a a non-working charger, the higher the chance that the battery may drain fully. This may be the reason why your iPhone 8 no longer charges.

Use another set of charging accessories

If the battery and device is fine, then the most likely reason is either the charging cable or adapter. Tiny wires inside a charging cable can break if not taken care of properly. The more wires are damaged, the less power the said cable may be able to transfer to the battery. To see if this is the case, use another official iPhone 8 charging cable when charging. Do the same for the current adapter.

Power surge

In some rare cases, charging smartphones may be damaged due to unexpected power surges. Power surges can happen any time creating sudden large input of power. If an electronic gadget like a smartphone is hit by a power surge, its built-in fuse may not be able to work properly causing catastrophic damage to the hardware. While rare, this is not totally impossible. If this is what caused the phone to refuse to charge or turn on, you’ll most likely end up replacing the unit.

Try DFU Mode Restore

Performing a DFU Mode Restore may be necessary if nothing has changed at this point. This troubleshooting step will restore all firmware to their default state so if the problem is due to bad programming changes, this might help.

These are the steps to do a DFU Mode Restore:

  1. Connect your iPhone 8 to your computer using the USB or Lightning cable that comes with it.
  2. Open iTunes on your computer.
  3. Turn off your iPhone 8 as you normally do. In iOS 11, you can turn off your iPhone by going to Settings-> General-> Shut Down menu-> then toggle the slider to the right. Doing so turns off the iPhone.
  4. Press and hold the Side button (Power button) for 3 seconds. Then, press and hold the Volume Down button  while still holding down the Side button. Keep holding both buttons for 10 seconds.
    • If the Apple logo appears, it means that you have held the buttons for too long. If this happens, you need to go back from the very start. Otherwise, skip to the next step.
  5. Release the Side button but keep holding down the Volume Down button for about 5 seconds more.
    • If you are prompted with the Plug into iTunes screen, it means that you have entered Recovery Mode instead. So you’ll need to go back to the very first step and make sure you’re not holding the buttons for so long.
    • If your iPhone 8 screen remains black, that means your device has successfully entered DFU mode. iTunes will then prompt you with an alert message saying that it has detected your iPhone and will allow it to be restored. Follow the onscreen instructions to restore your iPhone 8 in iTunes.

Send your iPhone in

As you can see, there are only two things that you can do on your end to fix the problem (use another set of cable and adapter and DFU Restore). If nothing changes after doing all suggestions above, you can bet bad hardware is the culprit. Contact Apple support so they can do a full hardware check and so you get firsthand information whether it can be repaired or replaced.


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