How to replace CF card slot cover?

Take a look inside your camera's CF card slot. I suspect that you may have a bent pin in there. If so, don't fret. Although professional repair would be more costly than the value of the camera, there is a chance that you can repair this yourself. Please see this link.

this is a common problem for these a80s and a whole bunch of other canon a's, call 1800 ok canon in canada or google ccd recall canon..

Take a look inside your camera's CF card slot. I suspect that you may have a bent pin in there. If so, don't fret. Although professional repair would be more costly than the value of the camera, there is a very good chance that you can repair this yourself. Please see this link.

Ebay, Canon, Amazon.com, Tigerdirect.com

It sounds memory card is defective and preventing camera to turn ON.
Check camera with another memory card or try this memory card in another Canon camera to confirm it.

See this link. The symptoms indicate that your CCD (image sensor) failed. Canon will repair this at no charge, regardless of warranty status. Contact them as described at the link.

Seems your Canon A80 camera got known problem of bad ccd imager IC that needs to be replaced.
Canon will replace ccd imager free of cost, click Canon CCD Imager Advisory for details.
Thanks.

In general it is pretty hard to recover photos on a compact flash card once it has been erased and overwritten. You can just erase and take pictures over it many timesand this will pretty much take care of the problem.

You can also use an external card reader and load videos, pictures, data, etc. several times and this should make recovering your previous photos almost impossible.

You can try another option which does what the 1st two suggestions did (except it is automated) and use a commercial software program. Here is one such program. http://www.photorescue.net/downloadcardwiper.htm

Is the card inserted correctly?
Is the card release button- under the cover locked down?
This needs two pushed to get it to lock in.

Try a CF card reader. If that shows no files then try some file recovery software with the card reader acting like a drive. There are some nice freeware programs that might help. It may be that the files are corrupted then the solution is more difficult. Good Luck!