Canon EOS Digital Rebel XT Firmware Update Procedures page 5

EOS DIGITAL REBEL XT / EOS 350D DIGITAL Firmware Update Procedures
After checking the current firmware, both the current
and the new versions will be displayed on the LCD.
(5) Execute the firmware update after confirming
the version to be installed, by selecting [Yes] with
Cross Keys and pressing the "SET" button.
The message on the left will appear during the update.
When the update is completed, the message on the left
will appear on the LCD.
(6) Complete the firmware update by pressing the
"SET" button.
(7) The message on the left appear on LCD monitor,
so please turn the camera OFF.
The firmware update is now completed.
When the firmware update operations are finished,
the camera off and remove battery from the camera for at
least two seconds. This will cause the new firmware to
take effect after the battery has been reloaded and the
camera is turned on.
Format the CF card before using it again.
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