The built-in flash on my EOS 5/A2/A2E won t pop up. What s wrong?
This is a fairly common problem. The camera s hotshoe has two small microswitches which detect the presence of a flash unit – or anything else – in the shoe. If either of these switches are depressed then the internal flash unit will not pop up. Unfortunately these switches can easily get stuck. For more information on fixing this problem, which usually involves a couple minutes of work with a small Philips-head screwdriver, have a look at this Photo.net post by Todd Fredrick.