p.1 #1 · Won’t Power On Until Battery Is Reinserted
This has happened 1 time on my R8 and twice on a brand new R50V: When I switched on, there's no response at all - no lights, no display, as if the camera had no power. Repeatedly turning it off and on didn’t help. I had to remove the battery and reinsert it before it would power on normally.
Batteries are all original Canon batteries with adequate power (at least 50%).
Anyone else experience this? Should I take them to Canon Service Center?
Aug 12, 2025 at 11:12 AM
AmbientMike Offline • • • • • • [X]
p.1 #2 · Won’t Power On Until Battery Is Reinserted
I've certainly pulled the battery, if the camera is acting funny, before, and had it return to regular operation.
p.1 #3 · Won’t Power On Until Battery Is Reinserted
This has been happening with my R7 recently....latest FW?? As I think it started after. I do pull the battery out (3rd-party and OEM) and I'm back in business. Little scary though.
p.1 #4 · Won’t Power On Until Battery Is Reinserted
Several times annually I have to restart, pull battery and or reset to factory default my Mac Studio, Honda Accord and Canon cameras to get them to work correctly. The that's the price we pay for the convenience of silicon chips and computer code. A couple months back animal eye focus stopped working and was grayed out on my R7 menu, albeit human eye focus was still available. The only thing that would cure it was a reset and afterwards I had to spend an hour inputting my fav custom settings...
p.1 #5 · Won’t Power On Until Battery Is Reinserted
Multiple cameras should not lock up. In the MILS era I've used at least 8 R5s and 6 R5 IIs with like 2 lockups total, both with adapted lenses. My R7 has never locked up, but I don't use it that much due to the vibration and low quality. In the past 12 months I've only captured about 300,000 images with zero lockups on any A7rV, R5, R5 II, and R7.
My point is that a rare error might be acceptable, but frequent lockups are indicative of some defect either software or hardware. The R5 II is known to struggle with power at frozen temperatures. I'm not aware of other Canons like that.
p.1 #6 · Won’t Power On Until Battery Is Reinserted
EB-1 wrote:
Multiple cameras should not lock up. In the MILS era I've used at least 8 R5s and 6 R5 IIs with like 2 lockups total, both with adapted lenses. My R7 has never locked up, but I don't use it that much due to the vibration and low quality. In the past 12 months I've only captured about 300,000 images with zero lockups on any A7rV, R5, R5 II, and R7.
My point is that a rare error might be acceptable, but frequent lockups are indicative of some defect either software or hardware. The R5 II is known to struggle with power at frozen temperatures. I'm not aware of other Canons like that.
It's interesting that you mention adapted lenses. I think my cases happened with adapted (EF) lenses as well. I wonder why that is or what camera setting I can tweak to prevent this.
p.1 #7 · Won’t Power On Until Battery Is Reinserted
I never got to the bottom of it but IMO it's somehow related to the auto sleep mode after the camera wakes up. I have got into the habit of turning it off/on all the time during the day and have not had a lockup since.
Could absolutely be irrelevant and nothing to do with it.... but there is a base issue for sure in these cameras.
p.1 #8 · Won’t Power On Until Battery Is Reinserted
A couple of careful swipes of the battery as well as camera contacts using a new pink pencil eraser might help this. Not only have I cleaned camera and battery contacts using this, in my former life as an electrical engineer I solved many an electrical contact problem using this method. It was always my first attempt, and if that didn't solve it, I began resorting to other more difficult methods. Be careful, and only use the pink rubber. You absolutely don't want to use anything abrasive. The old abrasive typewriter eraser pencils are becoming rare now, but they still exist. Totally avoid anything abrasive for this job.
p.1 #9 · Won’t Power On Until Battery Is Reinserted
When I shot with a Fuji X-T2, the camera would lock up (sometimes at the worst time).
Their service was always helpful, and they sent me a previous firmware version, thinking it was an update glitch.
I went back to the older firmware version, then loaded the new version and all was OK since then.
