WTF iphone screen goes blank

[eplchamps0304]

My iphone screen just went black. No matter what I do it wont come on. Plugged phone t pc and it does connect to itunes. Currently restoring to see if that helps. Anyone had this issue?

[scminunni]

just started today with the same issue, iphone will not turn on no matter what, was able to answer one call while in this state, but subsequent calls do not display. did your restore work?

[ashley1407]

Hold power button and home button down together until it comes back on again.

[tongteh]

i had the same problem a few days back.. when i try restarting the phone, it just got stuck in the apple logo loading screen.. restore did the job for me but sure hope that it wouldn't happen again..

[gredden]

My new 3G did the same thing. Took it to Apple store and it was my old case.
You have to buy a case that is 3G capable. Old cases cover the Iphone antenna. Since I got my new case, no problems at all.

[iphoneg33k]

I had the same problem. I did a restore but it happen again, plus why would Iphone antenna cause this?

I would understand the sign not being strong but why the antenna....

My iphone has been acting funny the last couple of months. The first week I lost all sound to it. Once in a while it crashs, I think I might take it back but I'm affaid that I will get some one else iphone. I want a new one out of the box... Don't want a refrib one ... Have anyone received a refrib one rather then a new one?

[andyblila]

It's not the antenna, it's the IR proximity detector. The cases are covering it up and the phone thinks you are holding it to your head so it shuts off the screen. Get a new case and the problem should go away. To test this out....remove your phone from the case and see if the problem goes away.

[PaulSe]

Originally Posted by andyblila

It's not the antenna, it's the IR proximity detector. The cases are covering it up and the phone thinks you are holding it to your head so it shuts off the screen. Get a new case and the problem should go away. To test this out....remove your phone from the case and see if the problem goes away.

I had a problem like that described here:

http://discussions.apple.com/thread.jspa?messageID=6605601.

Following the idea that it was the screen protector, I removed it, and that seemed to make the problem go away.

I'm guessing the screen protector I have was internally reflecting the IR signal back to the detector even if it wasn't close to my ear. Perhaps this could be adjusted with a software setting.

Looking closely under a bright light, I found what appeared to be a sensor / emitter pair on the 3G phone. It is even with the ear piece and about 5mm to the left. There's also what is probably the light sensor slightly to the left of that.

I used a regular paper hole punch on the clear screen protector to make a hole centered over the pair. (Not that great looking, yet cheaper than a new case.) Problem seems to be resolved.

[Reddawg124]

Thanks Andy, I removed the screen protector and the phone came back home.

[pcunite]

I'm using the Griffin iPhone 4 Screen Care Kit 3 pack which has cut outs for the sensor. No trouble with them...

[jillianmico]

The unlock screen on my iphone was lit however when i slide to unlock it everything would go black... but the phone was still on.. What fixed it for me was turn on a light bc i was in a dim lit room.. hopefully its a quick fix for you as well

[rosaage]

Originally Posted by ashley1407

Hold power button and home button down together until it comes back on again.

Thanks it worked fine on my ipod touch 4g.

[chickenseatpigs]

Originally Posted by ashley1407

Hold power button and home button down together until it comes back on again.

Thanks so much for the help. My screen went blank and I started freaking out. Holding down the power and home button fixed the problem. Thanks so much.

[Iphull]

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My iPod did this once. I hooked it up to iTunes and it seemed to fix itself. I'm I bang-on-it-till-it-works type of troubleshooter.