Back light on my iPhone seems to be going out?

Hey DanaPost,

Thanks for the question. I understand you are having issues with the backlight on your iPhone 4S display. The following resource provides best troubleshooting steps and suggestions:

iPhone: Hardware troubleshooting

http://support.apple.com/kb/TS2802

Display has no backlight or dark screen

- Toggle the ringer switch to see if the unit vibrates. If it does, it could be that iPhone is getting power, but is not displaying any image.

- Try turning iPhone off and then on again.

- While connected to the iPhone charger, try to reset the iPhone.

- If the low-battery screen appears, charge the iPhone.

Display does not adjust brightness automatically

The ambient light sensor brightens the display when using the iPhone in brightly lit environments, and dims the display in low light. To test this sensor, do the following:

- If the iPhone is in a protective case, remove it from the case. If there is a protective film on the display, remove the film.

- Verify that the Auto-Brightness setting (Settings > Brightness and Wallpaper) is set to ON, and that the Brightness level is set near the middle of the slider.

- Press the Home button to return to the Home screen and then press the Sleep/Wake button to lock the iPhone.

- In a bright environment, cover the top third of the iPhone to block the light, then press the Sleep/Wake button or the Home button to wake the phone. Slide the slider to unlock the phone.

- Notice the brightness of the screen and application icons; they should be somewhat dimmed.

- Remove the cover from the top of the display and in a few moments the display should get brighter.

Please note that if your issue is not resolved by following these steps, the iPhone may need service.

Thanks,

Matt M.