TimberCLipse wrote in post #14727745
Tried that originally with no luck at all...
It also would have done the same when I left it out all last night... Unfortunately, it doesn't fix anything.
Are you sure?
You wrote that you removed the battery and let it sit overnight. And in this most recent response you refer to it, as if it's a single battery. Both posts imply you didn't take out all the batteries.
To force the camera to reboot, you have to remove a minimum of two batteries (three plus the grip, if using a grip)... You have to remove the main rechargeable and the small, silver date/time memory battery that sits in a tray alongside it in the battery compartment on the bottom of the camera. You then have to leave the batteries out for at least half an hour... maybe more. Or try the trick of turning the camera on without any batteries and pressing the shutter release button once to speed up the process (it won't actually fire).
Then put the batteries back in and check the date/time. If you have to reset it, you got the camera to reboot. If not, you have to repeat the process.
If you get the camera to reboot, be sure to check your menu settings and custom functions before going out and shooting. Any settings might have reverted to the defaults.
If none of this helps, I suspect the shutter release button is stuck... either on the camera or, if you have one installed, on the grip. (If the camera does the same thing without the grip installed, that eliminates the grip as the source of the fault.)Dirt or grim getting into the switch might cause that. I suppose moisture might, too.
Try pressing the button repeatedly a few times, with camera turned off.
I have not heard of this being done on a 7D or it's grip, but there are some posts here and on the internet about cleaning the shutter release button of 50D and 40D with isopropyl (rubbing) alcohol. It's not ideal, but might work in a pinch. Not sure if it will work on 7D because I know it uses a different shutter release button than those other models, at least on the camera body. The 7D's shutter release button is more similar to what's used on the 1D series cameras (shorter stroke, less lag and better sealed than 40/50/60D). You do this "repair" at your own risk. It involves "flood cleaning" the shutter release button from below, without disassembling the camera. It really should be professionally disassambled and cleaned more carefully, but we do what we have to do when on a trip. Again, if you try this, it's at your own risk and there is some danger of getting the alcohol into places it shouldn't go.