Canon EOS 5D Mark II Rear Button ContactReplacement

This guide will show users how to replace the data ribbon cable that registers button presses of therear panel buttons.

Written By: Mike Seed

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

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INTRODUCTION

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

TOOLS:Phillips #0 Screwdriver (1)

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

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Step 1 — Back Panel

Peel back the rubber cover abovethe in/out ports to reveal two screwheads.

Step 2

Remove both 5.4 mm screws usinga Phillips #0.

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

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Step 3

Lift the in/out port plastic coveringfrom the bottom where the backupbattery used to be.

Step 4

Remove each 6.3 mm screw oneither side of the viewfinder using aPhillips #0 screwdriver.

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

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Step 5

Remove the three 4.8 mm screwson the bottom of the back plateusing a Phillips #0.

Step 6

Peel back the rubber covering nextto the menu dial to access thescrew.

Remove the single 3.4 mm screwusing a Phillips #0.

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

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Step 7

The back panel can now fall offeasily by turning the device upsidedown. Be sure to catch it so the dataribbons do not tear or tug.

Step 8

Remove each data ribbon cablefrom the motherboard by applyingpressure down towards themotherboard and gently sliding yourthumb upwards on the slot wherethe cable meets the motherboard.This will raise a very small clip thatlocks the cable in place.

The back panel is now free from therest of the device.

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

© iFixit — CC BY-NC-SA www.iFixit.com Page 6 of 8

Step 9 — Rear Button Contact

Remove each of the four 4.8 mm screws holding the protective plate over the button contact ribboncable.

Step 10

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

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

© iFixit — CC BY-NC-SA www.iFixit.com Page 7 of 8

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

Step 11

Pull back the rubber backing foundunderneath the blue ribbon cable.

Step 12

You can now use a brush to cleanany built up residue beneath thebuttons.

Canon EOS 5D Mark II Rear Button Contact Replacement Draft: 2015-01-09Guide ID: 32709 -

This document was generated on 2019-09-23 02:29:56 PM (MST).

© iFixit — CC BY-NC-SA www.iFixit.com Page 8 of 8