08-08-2017 03:59 PM - edited 08-08-2017 03:59 PM
08-08-2017 04:36 PM
You're out of luck. The instructions provide ample warning about not doing a firmware update unless you're certain that your battery is in good condition and fully charged. Send it to Canon. They can fix it, but you almost certainly can't.
10/15/2025: New firmware updates are available.
Speedlite EL-5 - Version 1.2.0
Speedlite EL-1 - Version 1.1.0
Speedlite Transmitter ST-E10 - Version 1.2.0
07/24/2025: New firmware updates are available.
EOS R5 Mark II - Version 1.1.1
07/23/2025: New firmware updates are available.
7/17/2025: New firmware updates are available.
EOS R6 Mark II - Version 1.6.0
02/20/2025: New firmware updates are available.
RF70-200mm F2.8 L IS USM Z - Version 1.0.6
RF24-105mm F2.8 L IS USM Z - Version 1.0.9
RF100-300mm F2.8 L IS USM - Version 1.0.8
RF50mm F1.4 L VCM - Version 1.0.2
RF24mm F1.4 L VCM - Version 1.0.3
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