Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
The answer to your question depends upon what camera you have, but the answer is probably 'no'. You cannot hope to fix it, yourself, unless the problem is something as obvious as the dial being jammed with a foreign object that can be extracted without breaking it off.
Let me know more details, and also, how new or old the camera is, and I will instruct you more specifically.