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Rick, Technician
Category: Digital Cameras
Satisfied Customers: 1725
Experience:  I'm a photographic equipment technician with over 25 years in the business
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My Cannon PowerShot G12 has had a knock. All the camera functions

Customer Question

My Cannon PowerShot G12 has had a knock. All the camera functions are working correctly but the display screen is intermittently switching between showing a true image and a distorted image. The camera records the image precisely as displayed on the screen. Sometimes a good image, sometimes a distorted image.
Please can you try to diagnose the fault for me.
Submitted: 4 years ago.
Category: Digital Cameras
Expert:  Rick replied 4 years ago.

Hi. My name isXXXXX'm a camera repair technician with over 20 years in the business and I'll be glad to help you with your question today.


This could be caused by one of two things. Either the CCD image sensor is damaged or its connection to the main circuit board is loose. It will require disassembly to determine which. This should be done by a qualified technician. Below is a link to a directory of repair shops, one of which should be in your area and able to help you.

Customer: replied 4 years ago.

Hello Rick,


As the camera isn't insured and the professional quotes I've had to check it out are so expensive I'd like to try to see if I can effect a repair myself.

I'm quite capable of disassembling the camera myself as I'm an amateur watch repairer and am used to working on small and delicate movements and components, but would be grateful if you could give me some guidance as to what the CCD image sensor looks like and where it's located in relation to the other components. Also, do you have any idea how much an image sensor is likely to cost from Cannon. Thank you.


Expert:  Rick replied 4 years ago.

Certainly. The CCD image sensor is the component in the center of the back of the lens assembly. You will need to remove the LCD monitor and metal plate to access the CCD. Be careful with the little plastic clips tat hold the flex cables in place as they break very easily and also be aware of the flash capacitor and circuit as it carries 300v and if shorted will destroy the camera.


Canon does not sell the CCD image sensor as an individual part but it is available from many resellers on EBay. Below is a link to their website which lists a couple of CCD's for around $40 US.


Customer: replied 4 years ago.

Hello again Rick,


I've removed the back of the camera and can see the printed circuit board to the right hand side with a 12 mm wide orange flex cable leading to a slightly recessed metal plate to the left of centre of the camera. The metal plate is fastened with 3 screws held in place with clear gel. Please can you tell me if this is the plate which conceals the CCD image sensor behind? Thank you.


Expert:  Rick replied 4 years ago.
That's the CCD. The new one comes attached to the plate you are referring to. You will need to break the seals on the screws to remove it and you will need to adjust the new CCD for proper focus ones the new one is installed. Be sure to keep everything free of dust and debris and make sure the surface of the replacement is absolutely spotless. I would suggest leaving the old CCD in place until you obtain a new one.
Customer: replied 4 years ago.

Hello again Rick,

Thank you very much for all your advice, it's been invaluable. I'd like to get in touch with you again after I've fitted the new image sensor to let you know how I got on with the repair.

As this is the first time I've used this website I'm not sure how to do this. Do you have a direct email address or a contact reference on this website that I can use?

Best regards,


Expert:  Rick replied 4 years ago.

Hi Howard.


At this time, all you will need to do in the future is requestCustomerand your questions will be directed to me.


If we are done with this session, please click on "accept" or one of the positive rating icons.

Expert:  Rick replied 4 years ago.
Hi Howard. This is Rick. There should be an opportunity to leave a rating along with this post.