Iphone screen not responding?

My boyfriend's iphone (3G) recently broke and he said that if I could fix it that I could keep it.
I want to know whether it's something I'm able to fix myself rather that taking it into a repair shop as it will be cheaper in the long run.

Basically the screen does not respond at all, it's just black. I know that the phone's on because It still makes sounds but if you try to unlock it it doesn't respond either.

If anybody could tell me what to replace/link me to a video that would be great.

Bricked.

Try 1 of 2 things. Hold down the power AND home button at the same time for 10-15 seconds until you see an apple symbol on the screen, then let go AFTER you see the apple symbol. This resets the phone.

Or, plug the phone into iTunes and do an reset/restore from the computer.

If these methods don't work, then the phone is shot. If the phone is still under warranty, apple will replace it for free. Check your warranty status at the link below.

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