Often, it is easier to replace a phone than to try to repair it. In many cases, this is a good idea for those that are looking for an affordable solution, too since often times the repair service is more expensive than the phone would be to purchase new again.
If you need phone repair, it is almost always best to get professional service to help you. Do not try to do the repairs on your own, especially if you are unfamiliar with how this type of technology works. You may do more damage if you do it yourself.