Hi, I've had my camera (70D) for a few years now and this morning it started doing something it has never done before. When I turn the camera on I can't see through the viewfinder (yes lens cap is off) It happens in all modes, however, while it is on, if I turn the dial to change modes a couple of times, it clicks and then I can see through the viewfinder. I can then move the dial back to the setting I want and can see through the viewfinder still. However, as soon as the camera is turned off and then back on, the problem returns.
I saw a similar problem here about seeing through the viewfinder and so followed the suggestion of removing the lens and dusting out the cavity while holding the camera facing down. I've checked and the lens is attached properly. Neither of these fixed the problem.
Any suggestions as to what might be going on?
thanks
