Canon EOS Rebel T2

SOURCE: Canon Digital Rebel XT / EOS

In the communications option of the camera Menu, there are two options to choose from. Try changing the options. one of them works with Canon software to download images.

SOURCE: Canon EOS Rebel T2 300X Won't Autofocus or Take Picture

This may be a problem with the autofocus itself, try the following:

• If you have a different lens, see if the autofocus works with the other lens. If it does, there may be something wrong with your lens.
  
• Clean the contacts (the little metal things between the lens and the camera) with a slightly moist, lint-free cloth
• Try replacing the battery in the camera

SOURCE: canon rebel eos ds6041

DS6041 is the model number for Canon EOS Digital Rebel or 300D. It is a 6.3 megapixels DSLR camera from Canon.

All software and manuals available from the Canon site

http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=314&modelid=9430

SOURCE: Canon EOS/Rebel XT won't power up

Joe, this happened to me, just tonight... I got a new CF card and stuck it in, turned it on and one CF card flash. Completely dead from there. I found one of the CF card pins bent over, shorted out the socket and blew the mainboard fuse. I took the camera apart, found the fuse (labelled K) about under the set button area) I bridged the fuse with a bit of solder, straightened out the pin in the socket, put it all back together and it's working fine. The fuse is under the right side shield cover, it's labelled with a letter K. There is another fuse on the power inlet board (below the shutter button) and it's labelled 'P'...

SOURCE: My new canon rebel T2i/EOS

A 5 error is the camera thinks the flash is not raising. Look near the hinge for a small button and see if it is up or down. This lets the camera know is the flash is up or down and if the button is stuck down you will hear the motor fire a few times and it will then error.
Unfortunately, this is one of the problems that starts to appear on cameras with pop-up flashes. You can hit the button and pull it up at the same time. Only other option is to send it to Canon to get it repaired.
or, Get an Speedlite like the 430EXII or 580EXII. The flash unit may make your camera bigger, but the results will be much better once you learn flash techniques.