That will be a tough one I expect. Especially with the lack of information. Kind of like telling a mechanic that your 1994 fiesta broke down.
What is wrong with it?
What have you tried?
Do you have any knowledge on camera's at all?
Do you have any mechanic background?
Did you already use google?
These are some of the questions you can ask yourself before even attempting to fix it. Don't want to sound negative here, but I think you're in way over your head unless prepared.
Other than that, I wish you luck on this noble quest