iFixit - Answers With Device "Canon EOS 5D Mark III"

Canon EOS 5D Mark III: err 40 at power up

Tue, 19 Apr 2022 20:42:04 -0700

Hi,

my camera 5dmk3 power up correctly but it returns err 40. could it be an issue related to the PCB bottom or the DC-DC PCB, what's your opinion regard it?

I tried to load / access to your canon eos 5d mark 3 parts catalog , but it does not loaded. Is it in progress or is it not available?

Thanks in advance

Giorgio

⟐ Answer edited April 19, 2022 at 20:42 MST

Canon EOS 5D Mark III: Replacing Mode Dial on Canon 5DMkIII

Mon, 27 Mar 2023 02:21:52 -0700

The button and metal face plate for the mode dial on my Canon 5DMkIII are missing. I lost them last December while running through the jungle, trying to keep up with a troop of chimpanzees. The dial itself is still intact and I've been able to change the mode by pressing a small pin into the button hole to unlock the dial.

I have a complete replacement dial/button/face plate in hand. Does anyone know how complicated it is to change this out or where I might find detailed instructions. . . . . .or at this point, should I just send it in to a professional for repairs (I have replaced components on a number of other cameras, with good success).

Thanks!

⟐ Answer edited March 27, 2023 at 2:21 MST

Canon EOS 5D Mark III: Canon eos display of picture is white

Mon, 18 Oct 2021 14:00:44 -0700

Cmos replacement directions

⟐ Commented October 18, 2021 at 14:00 MST

Canon EOS 5D Mark III: Canon 5d mkiii av-out digital port replacement

Fri, 07 Jan 2022 16:09:40 -0700

Is it possible to replace the av-out digital port on my Canon 5d MkIII? I have replaced the cable but I still am unable to connect to my laptop for tethering or downloading my photos. I think the port has worn out.

⟐ Commented January 07, 2022 at 16:09 MST

Canon EOS 5D Mark III: Water damaged dslr. What would you recommend?

Sun, 06 Oct 2024 11:34:24 -0700

I am thinking about repairing a water damaged 5d mark iii that I saw while browsing online. In the description it says that it will not power on. When I’ve repaired water-damaged phones, it’s usually been the charging port or battery that needs a fix/replacement. What parts in a 5d iii may need a fix/replacent?

⟐ Answer accepted October 06, 2024 at 11:34 MST

Canon EOS 5D Mark III: Camera display not showing the correct image

Mon, 20 Apr 2026 08:13:51 -0700

LCD DISPLAY NOT WORKING

⟐ Commented April 20, 2026 at 8:13 MST

Canon EOS 5D Mark III: No display except when I turn it off

Mon, 20 Apr 2026 05:04:36 -0700

This might be user error (PEBIKAC) or a hardware problem.

My 5D Mark III works fine, except the display will not turn on. All other features are fine. The camera takes photos just fine. Press Menu or Play or INFO, and the display stays blank.

But when you turn the camera off, the LCD lights up like normal and shows the ‘Sensor cleaning’ image! The screen is perfectly bright and looks fine.

This one is stumping me! I can’t access menu settings to tinker at all.

⟐ Answered April 20, 2026 at 5:04 MST

Canon EOS 5D Mark III: ERROR 30 when I press the shutter

Sat, 25 May 2024 08:34:20 -0700

I get error 30 when I press the shutter, The message instructs to turn power off and on again or replace battery. After doing both there is no change, still error 30 however it does record the shot as I can review and see it on screen. So after every shot I take I have to turn it off. However if I shoot video there is no error what so ever.

⟐ Commented May 25, 2024 at 8:34 MST

Canon EOS 5D Mark III: Is the bajonet purely mechanical or electrical as well?

Fri, 17 Dec 2021 06:38:18 -0700

On the inside of the bayonet (inside of the body close to the mirror) there are 3 small springs (I think that that is what they are called), one of those springs broke. Is it risky to remove the ring and replace a spring from another body?

I am quite capable with teardown but by no means an expert.

@danj

In case I might have misunderstood, but these small springs are not removable without touching anything electrical?

⟐ Answer edited December 17, 2021 at 6:38 MST

Canon EOS 5D Mark III: Need help replacing the top cover

Sun, 14 Oct 2018 13:01:28 -0700

Thank you for post,matthew!

Cloud you tell me what which steps could be pass if i want to remove my 5D Mark III's top cover? my top LCD was broken with tripods sadly.i want to fixit by myself.

Look forward to your suggestions！

⟐ Edited October 14, 2018 at 13:01 MST

Canon EOS 5D Mark III: Where can I buy parts like a main board?

Wed, 08 Nov 2017 12:57:35 -0700

I have water damage and Canon did not want to touch it. Camera works fine other than light sensor not working properly.

⟐ Answered November 08, 2017 at 12:57 MST

Canon EOS 5D Mark III: battery drain in system.

Wed, 01 Feb 2017 00:15:33 -0700

the 5D mark !!! was left turned on and was not set on auto power off ,it totally drained the power and battery system .is this an expensive repair job . thanks .

⟐ Answered February 01, 2017 at 0:15 MST

Canon EOS 5D Mark III: CANON 5D Mark III Shutter Closing Rapidly in Video. FIX IT?

Thu, 08 Sep 2016 08:43:26 -0700

Hi..

How to open and clean the parts of a CANON 5D mk3...?

My 5D is 2yrs old. Mint condition..

The problem is the Shutter is closing rapidly some times in Video mode.

How Can i Fix it??

⟐ Answered September 08, 2016 at 8:43 MST

Canon EOS 5D Mark III: canon 5d mark 4 press start/stop button to activate movie shooting

Tue, 02 Aug 2022 01:41:06 -0700

hai help me please canon 5d mark 4

press start/stop button to activate movie shooting how to fix

⟐ Edited August 02, 2022 at 1:41 MST

Canon EOS 5D Mark III: The camera doesn’t read my card to download photos

Mon, 31 May 2021 08:14:34 -0700

The photos are on the card and I can see them on the camera viewer, but they won’t download to my iPad.

Canon EOS 5D Mark III: My camera is frozen. it is only showing a blue-ish screen.

Mon, 23 Dec 2019 15:15:52 -0700

I just recieved a canon eos m50 for my Christmas present. after taking few photos, I turned my camera off which lead to a busy screen for a long time. I decided to remove my sd card and battery pack and inserting it back in. the camera only showed a blue-ish colored screen when the battery pack was inserted. please help me.

Canon EOS 5D Mark III: How and Where can I purchase the Main board of the camera

Thu, 07 Mar 2019 08:33:34 -0700

Hello, I have been having difficulty getting the main board for my 5D mk iii. Please where can I purchase the main board of the camera and how much will it cost

⟐ Reopened March 07, 2019 at 8:33 MST

Canon EOS 5D Mark III: Removal of IR filter in front of sensor.

Thu, 11 Oct 2018 05:59:06 -0700

Hi,

I wonder if you could prepare a guide for removing the filter in front of the sensor in Canon EOS 5D MK III .Astrophotographers would be grateful for such a tare down in a safe manner.

Canon EOS 5D Mark III: could not change aperture value use for changing ring

Mon, 11 Dec 2017 00:04:54 -0700

My camera s aperture value is stil 10 could not changing