Having problems with your Canon EOS-20D Body only Digital Camera ?

Canon EOS Digital Rebel XTI 400D Displays Err 99. Problem with CF card. Replaced with brand new card-still same err 99 camera is totally charges, acts dead, keep flashing Err CF, I try to format, it then says busy and gives me an Err 99. Please help! I'm lost w/o my camera!

Answers :

Normally it can be an assortment of things:

Dirty contacts between lens and mount causing a glitch in the communication.
Use of outdated or obsolete chipsets on certain lenses
\015\012Jam in the motor
I/O error on the cf card
Mechanical failure

Most of the time its a bad contact with the lens and the mount. Try cleaning it with a q-tip to wipe residue off the metal contacts.
\015\012Hope that helps.........

This a firmware problem here look how to fix it here
Repair Help & Product Troubleshooting for Canon EOS-20D Body only Digital Camera

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Canon EOS Digital Rebel XTI 400D Displays Err 99. Problem with CF card. Replaced with brand new card-still same err 99 camera is totally charges, acts dead, keep flashing Err CF, I try to format, it then says busy and gives me an Err 99. Please help! I'm lost w/o my camera!

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