Canon EOS 5D Mark II Rear Button Contact Replacement

Written By: Mike Seed
  • Comments: 7
Canon EOS 5D Mark II Rear Button Contact Replacement

Difficulty

Moderate

Steps

12

Time Required

20 - 30 minutes

Introduction

This guide will show users how to access the rear button contact in order to replace or clean the button contacts. It is not necessary to remove the LCD or speaker in order to perform this guide.

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    • Peel back the rubber cover above the in/out ports to reveal two screw heads.

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    • Remove both 5.4 mm screws using a Phillips #0.

    I just accidentally stripped one of those screws. Is there anything I can do or am I...screwed?

    Casey Ayers -

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    • Lift the in/out port plastic covering from the bottom where the backup battery used to be.

    Before removing the port cover, you must also remove the screw to the left of the mic jack and the screw below the HDMI port.

    Teovall -

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    • Remove each 6.3 mm screw on either side of the viewfinder using a Phillips #0 screwdriver.

    It is important to remove the diopter adjustment screw and the diopter wheel above the right screw. Otherwise you will not be able to take off the top panel in step 22.

    Per Feet -

    Use Phillips #00 screwdriver.

    Mr Blueeye -

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    • Remove the three 4.8 mm screws on the bottom of the back plate using a Phillips #0.

    The screw on the left side of this photo is shorter than the other two.

    rakurai -

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    • Peel back the rubber covering next to the menu dial to access the screw.

    • Remove the single 3.4 mm screw using a Phillips #0.

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    • The back panel can now fall off easily by turning the device upside down. Be sure to catch it so the data ribbons do not tear or tug.

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    • Remove each data ribbon cable from the motherboard by applying pressure down towards the motherboard and gently sliding your thumb upwards on the slot where the cable meets the motherboard. This will raise a very small clip that locks the cable in place.

    • The back panel is now free from the rest of the device.

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    • Remove each of the four 4.8 mm screws holding the protective plate over the button contact ribbon cable.

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    • Free the blue data ribbon cable by firmly pressing your thumb over the black clasp at the end of the cable and sliding your thumb to the left. This will raise the clasp and free the cable.

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    • Pull back the rubber backing found underneath the blue ribbon cable.

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    • You can now use a brush to clean any built up residue beneath the buttons.

Conclusion

To reassemble your device, follow these instructions in reverse order.

Author

Mike Seed

Member since: 22/09/14

2983 Reputation

2 comments

Thank you for the great guide. Can you include one more step on the circular button as well? It will complete the guide by covering all the buttons in the back.

Also, do you have a recommendation on where to get a replacement button? My button is sticky.

Dat Chu -

My 5D Mark II buttons work fine in auto mode, but don’t function in other modes. IE Manual, AV, TV ETC. Do you think this is a button residue issue? My camera may have taken on some water during my last shoot. What fix would you suggest?

Brian Kingsberry -