Try performing a complete reset - this should iron out any electronic glitches.
SOURCE: Blank black screen for my canon powershot S1 IS digital camera
This is a common problem with S1 IS and it is caused by faulty CCD sensor. Note that you can playback captured images without any problem but in capture mode all you get is blank screen. Will have to go to Canon but note that Canon repairs these models free of charge when it is the CCD sensor that stops working.
SOURCE: My Canon Powershot A630's flash
I was having the same problem...
1. I took off the two screws on side closest to flash
2. Removed side cover
3. Gently wiggled the round silver capacitor at the top that is wrapped with a black film
4. Voila... the flash worked and I put the cover and screws back.
I think over time that little capacitor detaches because of the vibrations. Hope it's of help.
SOURCE: Cannon Powershot SD 870
you can change it to no flash by when your taking a picture press the right arrow
SOURCE: how to repair lcd screen canon powershot sx110-is
hi,
For that camera that died, here are some non-intrusive simple fixes that you should try before throwing in the towel. Copied this first post from somewhere. It was a fix for a Canon A520, but am not sure if it would work for other cameras with the same problem? For those of you with a camera that will not power up or turn on, especially if this occurred after a power interruption with your lens extended, please give it a try. If you do, please leave a comment on specifics like your camera make/model, and whether it worked for you or not.
"DEAD CAMERA, LENS OPEN-If the batteries run down completely while the camera is still open, it may not start up again when new batteries are installed. But if you remove the memory card, then install the new batteries, when you turn it on it should come back to life. Error E30 means you don't have a memory card installed, so turn it off, slip in the SD card and turn it on one last time."
OK, so the above didn't work. Next thing to look at are the batteries themselves. Are you using alkaline batteries, or worse yet those "Super Heavy Duty" batteries? If so, betcha we've just discovered your problem. Alkaline and regular "super heavy duty" batteries just don't have the power for more than a few pics in a digital camera. Some may even have problems just powering startup of the camera. It doesn't matter if they're new, and right out of the package. Digital cameras for the most part should only be used with rechargeable NiMH batteries (if you still have your instruction manual, open it to the "batteries" section. Pretty sure you'll see a statement similar to what I've just said). Most retailers sell NiMH batteries for around $7 for a package of four (about $15-19 for the batteries with charger). Keep in mind they'll save you big bucks in the long run over alkalines, AND they'll last for at least 100 pictures per charge (and probably many many more). You'll be very pleased with their performance, and may slap yourself for not buying them sooner. When at the store, look on the package for a power rating of at least 2500 mah.
OK, so maybe those newfangled batteries didn't fix your camera, don't give up just yet. The next thing to check is that your batteries are actually making contact with the battery posts, and that these posts are clean. If not, bend the posts up/down a little, and maybe clean them with a little rubbing alcohol on a Q-tip.
The next thing to try is examine both the battery and flash card door. There's usually a little switch on both doors (note some SD card doors do not have this switch) that activates when the doors are closed. If they don't, the camera won't start to prevent damage to the flash card or camera startup sequence. For most cameras its usually a little piece of plastic on the door that pushes in on a pin switch when the door is closed. Closely examine both doors to try to identify these switches. A lot of times that little plastic nib wears down or breaks off, but can easily be jury rigged with a small glued-on replacement.
If you've tried all of the above and still no luck, the problem is then likely to be internal to the camera. Am planning on posting sometime in the future some likely things to check, hopefully with a pictoral guide. One example would be that if your camera uses Compact Flash, check to make sure all pins are present and aligned in the card slot (if bent, simply unbend/straighten them with a skinny "jewelers" screwdriver, then insert the flash card for final realignment).
As before, if one of these simple fixes worked in your particular case, please leave a comment on your camera's make, and which fix worked.
Good Luck!
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SOURCE: how to repair lcd screen canon powershot sx110-is
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