topic Re: EOS R5 Mark 11 Firmware update not working in EOS DSLR & Mirrorless Cameras

EOS R5 Mark II Firmware update not working

cacanny — Tue, 26 Aug 2025 18:32:54 GMT

I'm trying to update the firmware. The <OK> button on the <Firmware update program> screen is greyed out. The <Cancel> button is not greyed out, but does not work. The camera will not turn off with the <OFF LOCK ON> switch. The only way to turn the camera off is to remove the battery.

How do I fix the problem and update to firmware version 1.1.1?

Re: EOS R5 Mark 11 Firmware update not working

Waddizzle — Mon, 25 Aug 2025 22:57:58 GMT

The touchscreen is disabled during a firmware update. The camera is waiting for you to move the cursor from CANCEL to OK. Use the rear dial to move it, and press [SET].

Re: EOS R5 Mark 11 Firmware update not working

cacanny — Mon, 25 Aug 2025 23:26:30 GMT

Jez!... Thanks. You could spend the rest of your life trying to work that one out.