45 minuten - 1 uur
I use my iphone 4 in a Logitec portable speaker dock allot. At the beach, at parties, in hotel rooms. Inevitably other, likely drunk, people jam the iphone 4 in and out of the dock without concern for the delicate contacts held within. One party it went too far and several of the 16-pin copper connections were broken. The phone would no longer charge and quickly went dead.
I bought ifixit's dock connector and a few tools (philips #000 rather than #00 is better) and went to work on this thing. It was tough having to gut such a small electronic device but I carefully labeled all items and got the puppy working well again.
Do this when you are relaxed and not over caffeinated. Have a well lit workspace and hopefully a magnifying glass. Label all parts with the steps corresponding to the ifixit manual. Good luck.