RE: CANON A720 digital camera

Dear sir,

Pls slide the cover outward ..( slide cover is below , at base of camera )

battery will come out

Things to check first for a camera that won't turn on are battery contact points (in your case, based on your statement of the battery removal, recommend spending some extra time inspecting the battery contact points of the camera), and micro switches that are located on the battery door and memory card doors. Troubleshooting tips on other things that need to be checked may be seen here. These tips won't work for every case, but they're worth a try.

Probably not as the cause is most likely broken molded plastic parts that where to small and thin to last very long. Seems to be a common problem on this otherwise great pocket camera. Use tap or a rubber band to keep the battery cover closed so the contacts still work. Bad design by Canon.

If you're willing to do the replacement yourself, you can order the parts from
http://uscamera.com/a720is.htm

Hi,

I had this on mine. If you pen the battery compartment door, you will see a piece of plastic labelled "CR1220". You can pull this out and replace the little CR1220 battery that it holds. That ought to solve your problem.

Mine is broken also. There are 2 tabs in the cover and 2 raised slots on the camera body. When you open the battery compartment, you are supposed to slide the lid forward releasing the tabs from the slots, before the cover pops open. If you don't do this, you ~will~ break the tabs (or the raised slots). Well someone who didn't know this got a hold of my camera tried to force the compartment door open, breaking the raised slots that are part of the camera body.
Take a close look at yours and figure out how this latch is supposed to work and then see which part is broken. If it's the tabs on the door you can buy a replacement door online (do a search) and have someone good with electronics install it. (requires soldering). If (like me) it's the slots on the camera body that are broken, then it's not repairable. The original parts are too small and flimsy to be repaired (designed to fail). My best idea is to find some other way to latch the door closed. I've tried a velcro strap but it doesn't hold the lid tight enough and I've looked in hardware and craft stores for some kind of latch that might work, if I could atach it to the outside of the door somehow, but haven't found anything suitable (it would have to be small but sturdy and attach to the thin plastic of the door)
I'm thinking of taking it to a jeweler because they work with very small parts and might have something that could be screwed into the plastic door and camera body.
If you know of a better fix, please let me know.

check it out repair at ; http://www.teleplancamerarepair.com/manufacturer/repair-camera-model-problems.asp?mo=17
their blog also offers excellent info.
free quote

Double check that the new batteries are actually good. Note that so-called "heavy duty" batteries are terrible for use in digital cameras.
Next thing to check is the battery door slide switch. This is a tiny black micro-switch in the the battery compartment. It's activated by a tiny plastic piece on the battery door slide mechanism that may have broken off.

http://uscamera.com/a720is.htm

Try checking this... on the battery door (the outside door) along the top edge (over the CF card pointer embossed in the back of the door) you should see a little plastic piece that pokes out... tis is supposed to push a small switch located in a slot over the battery compartment. It's the sensor that tells if the battery door is open or closed.. if the plastic part breaks off or gets chipped it wont push the button and the camera will not turn on when the shutter door is opened.