Here are a few things
to try:
1.
Remove the main battery and the small backup
battery (CR2025) from the battery compartment. Charge your main battery and put
both batteries back in once your main battery has been charged. Sitting without
batteries will give the camera a chance to reset itself.
2.
You may have a bad CF card. Try starting your
camera without a CF card or use another.
3.
Try reloading the firmware (camera's operating
system) using this link Canon.
http://web.canon.jp/imaging/EOS10D/10D_firmware-e.html
Be careful to follow instructions exactly
as restarting the camera in the middle of a firmware update will brick it and
you will need to send it back to Canon for repair.
Hope that helps,
Bax
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