Where is 3gs proximity sensor

My iPhone 3gs screen will not turn off when making a call. Resetting setting, restore to 'new iPhone' doesn't do anything. Was working fine before installing iOS4. I tried different types of materials. It seems the IR sensor is not calculating things correctly. When i put a white piece of paper directly on top of the sensor during a call, nothing happens.

When i try a green piece of paper the screen sometimes shuts of. It had to be right on top of the sensor though. When i put a solid black piece of paper on top of the sensor, it works. But not as good as it worked in 3. The inch distance is no longer working. Only works when light is completely blocked with a black surface.

Glad to see this because now it is definitely marked as a software glitch. Time for an update and press-release Apple. Footnote: The black material is a external hd-case. The screen does not stay of when it's put on top of the iPhone 3gs. I come on again in a second or 2. The light is dimmed do minimun, indicating that the ambient-light sensor is doing it's job. Can anyone confirm my findings? Reply Helpful Thread reply - more options Link to this Post.

Jul 8, PM in response to shafer44 In response to shafer44 Now i'm really convinced it's a software problem. When covering the proximity sensor with my hand it apparently does work, because the buttons do not respond to the touch.

The screen just won't go black.. In use, I observed out of the corner of my eye that the screen would blink on and off intermittently, depending upon how I held the phone. And it happened consistently whenever I rested the phone between my head and my shoulder-a common position, albeit one my neck never particularly appreciates.

While little official is known about this issue yet, I found it incredibly annoying to have my calls routinely interrupted. I asked around and found my colleague, Ginny Mies, had similar experiences. And some digging online shows Apple has an open discussion thread running 19 pages long, and counting. But shortly into my second call with the second handset, the proximity sensor problem kicked in again, and I activated the keypad.

Suggest a time?? This guide is missing information on how to start the process. Make a prerequisite guide! An awesome member of our community made this guide. It is not managed by iFixit staff. Removal of the original ribbon is a bit tricky. I use an automotive type of pick tool to remove the existing ribbon bracket. Read on for details on this repair. NOTE: Many vendors online sell defective units, and these ribbons damage easily.

When buying, buy a few because you may go through before you get a good one. For more info about me and my repairs, check out my blog. I do a lot of microsoldering repairs and what not. My blog of DIY and repair things for the iphone! It'll help me help you more! Use an automotive pick tool to lift the bracket up on the side of where the speaker lies.

Slight upward pressure, do not force or pry. Do the same with the other side and on the bottom of the bracket. This is held in with tension on fingers that clip into the screen midframe. Once the bracket is loose, you can pull it up carefully maneuvering it up and around the LCD and digitizer connectors.

Peel off the adhesive backing protectors from the new ribbon, and line up the holes in the ribbon with the ones on the bracket as so.