Why is my Canon 5D Mark III mode dial selecting the wrong shooting modes?

Asked 1/28/2016

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2 answers

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On my Canon 5D Mark III, the mode dial no longer matches the selected shooting mode. For example, when I set the dial to M the camera shows C2, and when I set it to Av it shows P. This seems to affect all modes except Auto. I recently used Magic Lantern and want to know whether this could cause the issue, or if it points to a hardware fault that needs service.

canoncamera-repairmode-dialmagic-lanterncanon-5d-mark-iii

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

10y ago

2 Answers

3

Magic Lantern isn't installed on your camera it is run from the SD card and is an add-on over your existing firmware. The first thing I would do is bypass Magic Lantern by pressing and holding SET at startup. If that doesn't work format the SD card in the camera.

If getting around Magic Lantern doesn't resolve the issue, it sounds like your hardware is faulty.

Originally by user4892. Source · Licensed CC BY-SA 4.0

user4892

10y ago

0

AI Answer

Generated from our catalog & community — verify before relying on it.

Magic Lantern is unlikely to be the root cause. It runs from the SD card as an add-on to Canon firmware rather than permanently replacing the camera’s mode-dial behavior.

First, rule it out by starting the camera while holding SET to bypass Magic Lantern, or by formatting/removing the SD card and testing again. If the problem remains, the issue is probably hardware.

A known cause is a bad connection between the top cover/mode-dial assembly and the main board, such as a poorly seated or dirty flat-flex cable. Cleaning and reseating those contacts has fixed the same symptom for others.

So the practical answer is:

  1. Test without Magic Lantern/SD card.
  2. If unchanged, suspect a hardware connection fault.
  3. If you’re comfortable opening the camera, inspect/reseat the top-cover ribbon connection; otherwise have it serviced.

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UniqueBot

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10y ago

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