I have a Canon PowerShot G6 and every CF card I insert in the camera displays Memory card error 100-0002. Any idea why this is happening?

http://www.usa.canon.com/cusa/support/consumer/digital_cameras/powershot_a_series/powershot_a70#ServiceAndSupport

Issue: Memory card Error
Solution: Try a different memory card and/or Reformat memory card PowerShot A70


Formatting a CF Card You should always format a new CF card or one from which you wish to erase all images and other data.
Please note that formatting a CF card erases all data, including protected images and other file types. Please check the contents of the CF card before formatting it.

1. Turn the power on.
   
   
2. Press the <MENU> button and select [ (Set up)] using or .
   
   
   
   
3. Select (Format) using or and press the <SET> button.
   
   
   
   
4. Select [OK] using or and press the <SET> button.
   
   
   
   
   • To cancel formatting instead, select [Cancel] and press the <SET> button.
   • The capacity of the CF card displayed after formatting will be less than the rated capacity of the CF card. This is not a malfunction of the CF card or camera.
   
   
   
5. Press the <MENU> button.

• If the camera does not work properly, the inserted CF card may be malfunctioning. Reformatting the CF card may solve the problem.
• When a non-Canon brand CF card is malfunctioning, reformatting it may solve the problem.
• CF cards formatted in another camera, computer or peripheral device may not operate correctly. When that happens, reformat the CF card with this camera.

You need to format new cards in the camera before using.

Believe it or not, the camera's internal clock battery is worn down, causing this problem. Unfortunately, it's buried deep inside your camera, and is difficult to replace. But happily Canon will fix this problem for free. Please see this link.

Check pins where goes CF card they might be bent or broken

Hi there, welcome to FixYa.

Let's work on the camera first.
1) Turn the camera off and remove the battery and the card.
2) Put the battery back in without the card and turn it on.
3) Turn the camera off and insert the CF card.
4) Turn the camera back on again.
See if that takes the message away.

If it doesn't leave me a comment and we go to step 2.
If it does, thanks for coming to FixYa.

Rob

It's possible a pin is bent on the connector in the camera. A good eye and a good flashlight and you may be able to confirm.

Hi,

May memory reader correpted or insert reversely memory card into reader.

Check your memory card to see if its locked!

It could be as well a malfunction CF card. Try to use another CF card in your camera. Good luck!

Well there is a known problem witht eh CF memory design, i hope this is not your problem but it may be. Take your camera into a well lit area or get a small flash light. Open the memory door and peek down inside the camera and look at the pins inside the camera. Are they all uniform? does any look bent or out of place? there should be 2 uniform rows no pins should be missing or out of place. If they are you have a connection problem. This is one of the issues with this memory format and its why they have changed the design to SD. This is common with people who remove the cards alot and use a reader over time the card and the slot becomes warn and its very easy to bend pins because the card isnt sliding in smooth. If this is your problem (a few bent pins) you may have to take it in for service or try and fix it yourself. Ive read about people using a mechanical pencil. Remove the lead and the pin slips right into the top and you can carefuly move it back. Hope this helps!