How to fix a iphone 4 that wont turn on?

my iphone4 will not turn on. It's been of since March 15th, 2013. I tried hooking it up to itunes and it the computer did not pick up that the phone was connected. Still off. I held the home and lock button down for about 30 seconds and its still off. I have checked my phone and i dont see any signs of water damages. Yes, it has been cracked and it is still cracked. What else should i do?

Connect to Wall Charger for 10 minutes, it may turn ON itself. If still nothing, keep on charger and Reset, hold both home and power buttons for about 20 seconds until iPhone turns ON. If still nothing, clean charging port with toothbrush and small amount of Isopropyl Alcohol.

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    how to fix a iphone that wont turn on

    Connect to Wall Charger for 10 minutes, it may turn ON itself. If still nothing, keep on charger and Reset, hold both home and power buttons for about 20 seconds until iPhone turns ON. If still nothing, clean charging port with toothbrush and small amount of Isopropyl Alcohol.

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    Denmark
    3
    3 Support3
    ✓
    ✓ 
    ✓
    TDC
    TDC Support3
    ✓ 
    ✓
    Telenor
    Telenor Support3
    ✓ 
    ✓
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