My camera won't flash no matter how many new batteries I put in it. It will take pictures that don't require a flash. I've reset everything twice and nothing has worked. Contacts are clean. When I depress the button, I get the flashing symbol blinking in the upper right hand corner of the screen and yet no flash. Any suggestions?

Some Canon cameras use some of the screws around the perimeter of the camera to serve as a safety switch to prevent activation of the flash if the case is opened. See this article for more info.

I was skeptical about this fix at first, but as per Mary's solution, I removed the 6 screws to the housing, eased the back and front plastic off, removed the plastic flash assembly shield screw.There, above the screen, you'll find a green and white ribbon cable.I carefully pushed them back into their seats and voila! The flash that used to only give me a blinking lightning bolt now works again after a 10 minute fix.Thank you!