topic Re: Canon 5D Mark IV randomly stops working in EOS DSLR & Mirrorless Cameras

Canon 5D Mark IV randomly stops working

SMPhotography20 — Wed, 08 May 2024 01:08:56 GMT

Hello,

I have had my 5d mark IV for a few months now and i have noticed some days at sessions i will be mid shoot and the camera will just quit working. the LED screen on top will stay on and all the numbers and settings still appear but the when looking through the viewfinder it is black and when i try to go into live view nothing happens. i can still press the play button and see images ive taken but the shutter will not fire and i cannot take photos. I carry a backup 90d body as a fail safe but i dont prefer to use it after the quality of the mark IV. it will stay locked up like this for around 30 minutes or so. ive noticed it resolves slightly quicker if i detach the lens and take out the battery.

am i crazy or has this happened to anyone else?

Re: Canon 5D Mark IV randomly stops working

deebatman316 — Wed, 08 May 2024 01:18:17 GMT

What lens are you using also is the viewfinder completely dark when this happens. What accessories do you have attached to the camera. Like a speedlite, battery grip ECT.

Re: Canon 5D Mark IV randomly stops working

SMPhotography20 — Wed, 08 May 2024 01:19:52 GMT

I have a sigma 70-200m 2.8 sport lens as well as a sigma 24-70m 2.8 art and it has happened with both lens. no battery grip or anything else added. just body and lens

Re: Canon 5D Mark IV randomly stops working

deebatman316 — Wed, 08 May 2024 01:22:36 GMT

Do you have a Canon lens to test out. What are the FULL NAMES of the lenses you mentioned above. I've seen cameras lockup like this with older 3rd Party lenses. The mirror will hang up for some unknown reason. Unmounting the lens and removing battery will reset the camera.

Re: Canon 5D Mark IV randomly stops working

SMPhotography20 — Wed, 08 May 2024 01:26:35 GMT

Sigma 24-70mm f/2.8 DG OS HSM Art Lens for Canon EF

Sigma 70-200mm f/2.8 DG OS HSM Sports Lens for Canon EF

Re: Canon 5D Mark IV randomly stops working

SMPhotography20 — Wed, 08 May 2024 01:27:17 GMT

I do not have a canon lens at the moment, that is next on my list to purchase!

Re: Canon 5D Mark IV randomly stops working

deebatman316 — Wed, 08 May 2024 01:33:17 GMT

Do you know anyone that owns an EOS DSLR or SLR camera. You could borrow their lenses. Just make sure they're Canon EF lenses NOT EF-S lenses. They won't physically mount on your camera. The lens could be incompatible. Does the camera display an error code when this happens. If so what error code is present. What firmware version are you currently on. How long have you had this camera.

Re: Canon 5D Mark IV randomly stops working

SMPhotography20 — Wed, 08 May 2024 01:35:49 GMT

It does not give me any sort of error code which i find strange. looks like firmware version 1.3.4

Re: Canon 5D Mark IV randomly stops working

deebatman316 — Wed, 08 May 2024 01:48:02 GMT

The most up to date firmware is 1.4.0 for the 5D Mark IV. How many shots can you get before the camera locks up. I recommend resetting the camera back to factory default and retest with Canon brand EF lenses. NOT EF-S, EF-M, RF or RF-S lenses. Also what kind of memory cards are you using. The 5D Mark IV allows both SD and CF cards. Are both card slots being used. What brand of cards are you using and what size. Are you using a Micro SD card in an adapter. If so discontinue using them and get a Full size SD Card. Try using the camera with any memory cards in it. Does it still lock up and cause problems.

Re: Canon 5D Mark IV randomly stops working

SMPhotography20 — Wed, 08 May 2024 01:55:33 GMT

Thank you! i will work on getting the firmware up to date. Honestly it just depends on the day, one session was maybe 20 minutes in, others are after 2 hours or so. I use the extreme PRO SD cards and i have it formatted to record to both SD and CF cards. they are both 128 GB. i have not tried without cards but i will have too

Re: Canon 5D Mark IV randomly stops working

deebatman316 — Wed, 08 May 2024 02:09:21 GMT

Does the 5D Mark IV lock up in the middle of the exposure. What is the drive mode set to. How many fps are you trying to shoot.

Re: Canon 5D Mark IV randomly stops working

March411 — Wed, 08 May 2024 12:25:20 GMT

Do you have the Sigma dock? It may be worth checking the firmware on the lenses also.

Re: Canon 5D Mark IV randomly stops working

shadowsports — Thu, 09 May 2024 01:57:55 GMT

Greetings,

Is your battery (or batteries) Canon brand? Have you performed a full reset of the camera's main and custom settings?

To test reset the camera.

Remove the lens and card(s). If you are using a battery grip this should be removed as well. Are you able to reproduce the issue. Allow the camera to sit idle, the go into power save, now wake it and repeat. Result?

If this works, add a lens, and again, allow the camera to go idle and then wake it. Repeat. Result?

Now, remove the lens and add the cards. Perform the same tests and attempt to reproduce the behavior.

This should allow you to isolate the issue which could be caused by one or more accessories.

If the behavior does not occur again, the issue was likely the cameras settings or a combination of customizations.

Having up to date firmware on both camera and lenses can be helpful, but I would not make any changes to either until I was sure the camera was functioning reliably.

Re: Canon 5D Mark IV randomly stops working

afronk8 — Sat, 13 Jul 2024 00:43:45 GMT

Hi! This is happening to me too… wondering if you found anything that helps! I noticed it’s when I try to switch from live view back to viewfinder shooting. My shutter won’t “open” and pressing the “start/stop” button switches the af settings back & forth between Servo and One Shot which it doesn’t normally do. Taking the battery out is the only way to reset it. It makes me so nervous—I would hate for this to happen mid-wedding or something!