Canon a720is I have a canon a720is that doesn't turn on. Display says change the batteries and then goes black. Camera is approx. 7 months old. I have changed the batteries constantly to no avail. Thanks.

There is an internal battery that you cannot change. When it goes out, the camera fails. There are several places online that you can send it to for repair

go to control panel then power option then change setting to TURN OF DISPLAY "NEVER"

I think flash pcb or main pcb gone dead so its require to change. Take it to canon service centre.

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.

I was having the same problem and changing to Alkaline batteries seems to have solved the problem. I hope this helps!

Either shutter jammed or CCD is gone bad.
Use warranty.

cudgegong said in another forum:

To resolve the annoying "change the batteries" problem. Goto menu, choose yellow menu, select
file No. reset to ON. Turn camera off and back on.

Voila fixed.

This is somthing your going to have to get fixed at a shop

I had the exact same problem. Since my camera is out of warranty, I decided to try to fix it myself; figuring the cost of repairing it would be close to the cost of a new, better camera. If yours is still under warranty, let Canon fix it for the cost of shipping.

I unscrewed all of the screws and carefully pried open the back of the camera. Part of it will come apart easily, but for the part that wouldn't, I slid a razorblade into the crack between the pieces and used it to separate the pieces.

I was shocked by what I found. The "mechanism" for switching between picture and review mode, appears to consist of a tiny black piece of something (doesn't look like metal, but I assume it's conductive). The physical switch that you operate on the back of the camera, appears to push this away from the circuit board. When that happens, the camera goes into review mode.

I assume that over time, this flimsy piece of whatever begins to wear out and eventually won't return to the circuit board. I slipped a small screwdriver under this piece and bent it back towards the circuit board.

That did the trick, The camera now functions as it's supposed to with one exception. Now, when I go into review mode, the lens won't retract (although it will when I power the camera down). Personally, I'm fine with that, because the lens going in and out is a huge waste of battery.

One thing I learned from this is that when you leave your camera inactive for long periods of time, make sure it's in picture mode, as this should reduce the strain on the flexible "switch".

Did you accidentally hit the "DISPLAY" button on the back of your camera? It manually turns the display on and off to save batteries.