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Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 16 or 32 GB capacity / black or white plastic back.

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How can I detect the problem on my 3GS?

My 3GS doesn't turn on and i don't know what the problem is. A few days ago it was difficult to turn it on but with several attempts i was able to turn it on two times. Since yesterday, after falling down from my hands, it doesn't turn on at all. How can i detect the problem or damaged part?

Thank you

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Pedro Coelho, first make sure that you check your dock connector to see if there are any broken, bend or otherwise damaged pins. After that you may have to take it apart and see if there is any obvious damage or dislodged parts. Could be as simple as a dislodged cable/connector or a bad battery, to as complicated as a broken logic board.Right now it would only be hypothetical and a guess about what could be the problem. Of course, you should also try a hard reset.

Hold the sleep/wake button and the home button at the same time.

Hold them both until the screen goes black.

Hold them until the white Apple logo appears then you can let go.

Hope this helps, good luck.

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how can i test the battery?


Pedro Coelho, there is really no easy way to test it, since most of use can only do a voltage test, which does not tell anything about the battery condition itself. If in doubt I would replace it.


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I would say it is def not the battery, but the power on/off flex.I have had this problem lots of times with different iphone 3gs.The flex is relatively easy to replace, and you will see when you buy the new flex that the silver shield behind your power button has flattened, and thus makes it hard, and in most cases impossible to switch the phone on, as the flex has broken down at that part.I would guarantee when you plug into itunes your phone comes on, backing up what I have just said.It (the flex) comes from the power button down the side of your camera, along the top of the battery is part of your headphone jack,volume button and mute button.

hope this helps


Dave (uk)

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David Glasgow

I´ve just plugged my 3gs into the computer and no response from the phone or computer, so ... i´m discarding the on/off switch possibility. I´ve ordered a battery and lets hope that do the trick, but thank you anyway :)


Pedro Coelho



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