Soakedlontra
Contributor
Yeah, you're making some sense...I think. Have you already removed the outer case? Be very careful doing this and don't force anything. The outer case is comprised of a front and back plastic shell. Consequently, it's very easy to chip or crack it. The flex wiring is inside the camera. You need to remove numerous screws on the outer case (prior to removing the outer case) and take off at least one metal bracket (removing the screws that hold it in place) in order to expose the flex wiring/ribbon cable of interest. This cable includes the button actuator underneath the on/off button. As I mentioned previously, it really helps to have a functional model (backup purchased on Ebay) in case you forget how things are put together.
Taking it apart, cleaning, and reassembling the camera will do absolutely nothing to solve your problem. It's not a mechanical button issue -- the actuator beneath the on/off button has failed. Therefore, the entire flex wiring/ribbon cable needs to be replaced.
A significant challenge will be finding the replacement part online. The store that I bought mine from doesn't have the part listed in its Ebay inventory anymore. I'm really not sure where to purchase it now. You might consider buying an AS-IS A570 on Ebay that has a lens error. Typically, those non-working units are less expensive. I'd be willing to bet that the flex wiring/ribbon cable that you need is still working in a "lens error" camera. If you have a properly functioning replacement part and you know what you are doing, it probably wouldn't take longer than 20 minutes to fix the issue.
Jeeeezz...Thank you very much for all the info. I went as far as taking the back of the case off...I am not going to try to take the front part off until Sam is back home...It is the first time that I open an electronic gadget. He makes tools to make tools and deals with mechanical problems every day.