Hi,My Powershot G7 was fine but the battery needed charging. I took the battery out and charged it as usual. When I replaced the battery into the camera, it simply would not power on.I have tried taking out the SD Card and closing the door and still no. I removed and replaced the battery countless times and still no. I got a new battery and still no.I metered the battery and found it was outputting 8.4v which sounds like its fully charged.Still I simply cannot get the camera to switch on.I was hoping there might be some reset button combination... or something, but cannot find anything anywhere.Unlike some people with this problem, I have not had any symptoms before this, I just switched it off one day and then it wont switch back on again.Any thoughts?
Usually you can't hear the loose screws in these when they fall out and short out the camera, although many people will say you can. When you have no power on a G7 or a G9, it is most always that loose screw problem. The screws inside should be corrected at the time of the repair so the problem doesn't happen again later. The site that is great for help with the Canon Powershot Camera problems is: www.camerasandparts.com They are great with these and that is all they specialize in. I would see if they can help, they're amazing if you need a hand with the Powershots, plus they do that no power correction on all G7 and G9's they service which I like. Good luck with it
Loose screws fell off inside and shorted the DC/DC board or main board
refer this tips
Canon G7 won’t power on
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I would assume that if a loose screw had fallen off inside and shorted something then I probably would hear a rattle when turning the camera over in various different directions.
With mine, the only thing I can hear inside is most probably the orientation sensor... certainly its a noise it always made and it sounds like a small pendulum switch (ie always makes the same noise) rather than a small screw bouncing around inside. It's not a sharp enough or random enough noise for a loose screw.
I would say this is not likely to be a camera with a loose screw fallen off inside.
Thanks for the suggestion though, and I'd like to hear any further suggestions.
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