itsnoelb Loc: Edgewater, FL. Originally: FLINT. MI.

Was working great. Then, charged battery and camera seems to "freeze". Screens all show but nothing works. No buttons, wheels, 0 works. Changed lens, zero. Took the lens off,,,
clickety-click. put the lens on (several L series) zero action. It only freezes with a lens on. Any ideas? Even the shutter button seems to "lock", it doesn't go down with lens on, but, again, works fine without a lens.

kpmac Loc: Ragley, La

Factory reset?

itsnoelb Loc: Edgewater, FL. Originally: FLINT. MI.

Not sure how to do that. Read a couple of things but...they seemed to drift about the order.

Haydon

Look at pages 53 and 204 in the user's manual. If you don't have one, download the manual pdf from the Canon site.

bleirer

Just throwing an idea, make sure the memory card didn't get dislodged when swapping the battery. If you push in inadvertently it releases.

Jrhoffman75 Loc: Conway, New Hampshire

Remove the wafer battery in the battery compartment. That removes all power from the camera and pretty much goes back to original factory settings.

Jrhoffman75 Loc: Conway, New Hampshire

"Even the shutter button seems to "lock", it doesn't go down with lens on, but, again, works fine without a lens."

This seems very strange - there is no linkage in camera between shutter button and lens.

Notorious T.O.D. Loc: Harrisburg, North Carolina

Aren’t they electronically linked...

Jrhoffman75 Loc: Conway, New Hampshire

Yes. But the electronic linkage doesn’t stop the shutter button from depressing. The electronic linkage (through various in-camera digital chips) controls focus and aperture.

imagemeister Loc: mid east Florida

1-800-OKCANON

Notorious T.O.D. Loc: Harrisburg, North Carolina

Actually I believe my Canon body has a mode that can prevent the shutter from releasing if focus is not achieved. I would also check the contacts between the lens and body...

Jrhoffman75 Loc: Conway, New Hampshire

Releasing yes. Locking and not going down no. But perhaps the OP is confusing not actuating with not depressing.

In that case 1. OP should switch lens to MF and see what happens and 2. check that all the gold contacts in the mirror box are free to move.

Picture Taker Loc: Michigan Thumb

Best call Canon tech (800) 652-2666

itsnoelb Loc: Edgewater, FL. Originally: FLINT. MI.

I will check. Mayby wafer battery is dead?

amfoto1 Loc: San Jose, Calif. USA

That's a possibility, although probably not very likely.

If the date/time battery (usually a CR2025 or similar, widely avail. at grocery and drug stores) has never been replaced, it would probably be a good idea to do so. They usually are good for about 5 or 6 years.

But all those batteries do is maintain the date, time and various camera settings when the main power is turned off. Usually the worst that happens when one dies is that the date/time are wrong and you lose some of your settings. Though it wasn't something I tested, with all Canon cameras I've used I believe it was still possible to take photos even with that battery dead (EXIF data will show incorrect date, though).

Suggestion to "reboot" the camera is a good one.... sometimes clears a problem and it's free and easy to try.

To do a reboot:

1. Turn camera off... remove both the main battery and the date/time battery.
2. Turn camera on without batteries... press shutter release button once. This quickly drains any power remaining in the camera.
3. Turn off camera, reinstall both batteries.
4. Turn on camera, check date/time. If they need to be reset, reboot was successful. If not, see below.

Alternative method, everything the same except:

2. Turn camera on without batteries... let it sit for "a long time". Exactly how long is hard to say... some cameras only need 45 min or an hour. Other cameras need to sit overnight. You can try the shorter period of time, do steps 3 and 4, and will know if it's long enough if you find date/time need to be reset and the reboot was successful. If not successful, repeat the process leaving the batteries out for a longer period of time.

Note: Rebooting will require you to reset any menu selections or custom functions you've changed. The reboot will usually reset everything to factory defaults.

Another thing that's free and easy to try yourself is a firmware update or, if it's already up to date, re-installation. The firmware and instructions how to install it can be downloaded from the Canon websites.

You also might check that the contacts between lens and camera are clean and clear. The contacts on the rear of the lens are gold plated, so don't use anything abrasive to clean them. I recommend a clean, lint free cloth slight dampened with a little isopropyl "rubbing" alcohol. Usually the problem is oils on the contacts, and this will remove them. Also check the corresponding "pins" just inside the lens mount. They are spring loaded, so should pop back out after being carefully and gently pressed with a fingernail. It's rare, but sometimes one will get "stuck".

And, check that your main batteries are getting fully charged. Low power can cause cameras to do strange things. Old batteries or a failed battery charger may be the actual cause of the problem.

Finally, also operate the camera's power switch, as well as the various switches on the lenses. Most of those are "self cleaning". But if left unchanged for a long period of time, some oxidization or something else might get in there and cause problem. Simply operating the switch a few times... maybe a dozen times at most... will clean them and insure good contacts.

All these are relative long shots... but things you can do yourself, costing nothing or relatively little. If they don't work you may need to send the camera to Canon for repairs.