iPhone 4S

Fifth generation of iPhone. Repair of this device is straightforward, and requires screwdrivers, prying tools, and patience. GSM/CDMA / 16, 32, or 64 GB / Black or White.

2448 Questions View all

Ambient Light Sensor Not Working?

I'm trying to pinpoint a problem with the Ambient Light Sensor for the 4S, whether it's a software problem or something else?

I replaced the power, ambient light sensor, proximity sensor flex cable yesterday but the problem still remains.

Has anyone had any success?

iPhone 4S

iOS 6.0.1


Answer this question I have this problem too

Is this a good question?

Score 0
Add a comment

2 Answers

Most Helpful Answer

this sometimes happens when you have OEM display. have you changed that recently?

Was this answer helpful?

Score 1


Not OEM but I did install the foam that separates the sensors. Proximity sensor works fine...

by Guesto

Add a comment


Grab a flashlight or go to a dark room. This might sound like a joke, but bear with us, since the end results are completely worth it.

Launch the stock Settings app on your iDevice and head to the ‘Brightness & Wallpaper’ section.

Turn off the ‘Auto-Brightness’ toggle.

If you went into a dark room and there is no light around, drag the brightness slider to its minimum level. For those who can’t find a dark place, hold a flashlight (or any light source) as close the iPhone’s screen as possible, and crank the slider to the maximum.

Now that you have calibrated the sensor, toggle on ‘Auto-Brightness’.

Was this answer helpful?

Score 1
Add a comment

Add your answer

Guesto will be eternally grateful.

View Statistics:

Past 24 Hours: 2

Past 7 Days: 9

Past 30 Days: 93

All Time: 4,021