**Hi, I am a technical expert specializing in mobile devices and repair.** I have worked on a wide range of devices, including iPhones, and I am familiar with the various troubleshooting and repair techniques.

**Here is how to reset an iPhone 6 when the screen is black:**

1. **Connect your iPhone to a computer using a USB cable.** You can use either a Mac or a Windows PC.

2. Put your iPhone into recovery mode. To do this, press and hold the Volume Down button and the Power button simultaneously. Keep holding both buttons until you see the recovery mode screen on your iPhone.

3. Open iTunes on your computer. If you don't have iTunes installed, you can download it from Apple's website.

4. Click on the iPhone icon in iTunes. This will open the iPhone's summary page.

5. Click on the Restore button. This will start the process of restoring your iPhone to its factory settings.

6. Click on the Confirm button. This will confirm that you want to restore your iPhone.

The restore process will take a few minutes to complete. Once the restore is complete, your iPhone will restart and you will be able to set it up as a new device.

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Here's how you force your iPhone 6 to restart and enter Recovery mode:Press and hold the Sleep/Wake and Home buttons simultaneously.Keep holding both buttons and do not release when the Apple logo appears.Wait for the Recovery mode screen to display and then release both buttons.More items...read more >>