If you bought a simple point and shoot or a digital camera that is fairly new, the first thing that should be done is to send it to the company that you bought it from, as part of their service.
If you bought a Nikon camera for example, you should be sending it to Nikon USA.
Just by looking at the website of the camera's manufacturer you will find the phone number and address of the nearest repair facility.
SLR camera repair might be a bit harder if you're not from USA, but from a third world country.
Still, you always have the option of sending the camera body together with your credit card number to a company that repairs digital cameras.
If the camera you want to repair is an older 35mm model that has some kind of sentimental value, then the $200 you might spend to repair it can be worth it.
In this case, send it back to the manufacturer, Pentax, Nikon, whoever they might be.
Now, in some cases, if the camera is way too old, they might reply that they don't have the needed parts anymore.
Something like that can happen with a 20 year old camera for example.
If this happens, you can contact a shop that is independent and ask them to take parts from other similar cameras that aren't working anymore, using them to repair your camera.
In some cases you can even make some of those parts from scratch.
One shop that I found it capable of tasks like this is New York City Professional Camera Repair shop, which can be contacted at this number: (212) 382-0550.
If your camera is a Hasselblad, then you might have some success if you send it to Ghitelman Gil.
He has his own repair guy for Hasselblad cameras.
If you live in New England, then you should consider talking with Steve Grimes 401-762-0857, or check out his site, at skgrimes.
com.
He uses custom machining to solve a number of problems, together with shutter repairs of the larger format, mounting lenses and many others.
Unfortunately I don't have a list with the best camera repair shops from each state.
Instead, you could use a local neighborhood service to get the advice you need or ask your local camera shops for advice.
If you still can't find the tips you need, consider buying a new digital camera instead of doing SLR camera repair.