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Canon EOS 5D Mark II Rear Button Contact Replacement

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  1. Canon EOS 5D Mark II Rear Button Contact Replacement, Back Panel: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Peel back the rubber cover above the in/out ports to reveal two screw heads.

  2. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove both 5.4 mm screws using a Phillips #0.

  3. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Lift the in/out port plastic covering from the bottom where the backup battery used to be.

  4. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove each 6.3 mm screw on either side of the viewfinder using a Phillips #0 screwdriver.

  5. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:05crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Remove the three 4.8 mm screws on the bottom of the back plate using a Phillips #0.

  6. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:06crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • 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.

  7. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:07crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • 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.

  8. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:08crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • 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.

  9. Canon EOS 5D Mark II Rear Button Contact Replacement, Rear Button Contact: crwdns2935265:09crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Canon EOS 5D Mark II Rear Button Contact Replacement, Rear Button Contact: crwdns2935265:09crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Remove each of the four 4.8 mm screws holding the protective plate over the button contact ribbon cable.

  10. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:010crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:010crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • 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.

  11. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:011crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Pull back the rubber backing found underneath the blue ribbon cable.

  12. Canon EOS 5D Mark II Rear Button Contact Replacement: crwdns2935265:012crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • You can now use a brush to clean any built up residue beneath the buttons.

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

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Mike Seed

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USF Tampa, Team 1-6, Hickman Fall 2014 crwdns2935289:0USF Tampa, Team 1-6, Hickman Fall 2014crwdne2935289:0

USFT-HICKMAN-F14S1G6

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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 - crwdns2934203:0crwdne2934203:0

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 - crwdns2934203:0crwdne2934203:0

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