Introduction

Use this guide to remove a broken Motherboard from your Canon PowerShot SD850 IS.

Image 1/2: Two 2.8 mm Phillips #00 at the bottom of the camera. Image 2/2: Two 2.75 mm Phillips #00 on the opposite side of the wrist strap.
  • Remove the following 4 screws:

    • Two 2.8 mm Phillips #00 at the bottom of the camera.

    • Two 2.75 mm Phillips #00 on the opposite side of the wrist strap.

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Image 1/3: Remove the 2.75 mm Phillips #00 under the A/V OUT DIGITAL flap on the side of the wrist strap. Image 2/3: Remove the 2.75 mm Phillips #00 under the A/V OUT DIGITAL flap on the side of the wrist strap. Image 3/3: Remove the 2.75 mm Phillips #00 under the A/V OUT DIGITAL flap on the side of the wrist strap.
  • Open the A/V OUT DIGITAL flap on the side of the wrist strap.

  • Remove the 2.75 mm Phillips #00 under the A/V OUT DIGITAL flap on the side of the wrist strap.

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Image 1/2: Slide light gray door and pull up to open the door. Image 2/2: Remove the 8.35 mm Phillips #00 next to the brown tab that holds the battery.
  • On the bottom of the camera, use your fingernail to slide the light gray tab towards the edge of the camera.

  • Slide light gray door and pull up to open the door.

  • Remove the 8.35 mm Phillips #00 next to the brown tab that holds the battery.

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Image 1/2: Image 2/2:
  • Gently pull the front cover straight out from the camera. This will expose the wiring on the front of the camera.

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  • Remove the 2.75 mm Phillips #00 next to A/V OUT DIGITAL.

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  • Slide the back casing (with the screen protector) off to reveal the LCD and back wiring.

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  • Remove the 1.75 mm Phillips #00 located at the top left of the LCD screen.

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  • Remove the two 3.4 mm Phillips #00 located at the bottom of the camera.

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Image 1/2: Image 2/2:
  • Remove the two metal frames that hold the LCD panel in place.

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Image 1/1: Lift the screen from the left side and use a spudger or a small flat head screwdriver to flip the black portion of the connector upward to unlock it.
  • The LCD screen should now only be attached by two LCD data cables.

    • Lift the screen from the left side and use a spudger or a small flat head screwdriver to flip the black portion of the connector upward to unlock it.

    • Carefully slide the data cable out of the connector.

When reassembling the camera, the tab that gets flipped up to release the cable will not lock back down into place after the cable is reinserted.

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Image 1/1: To remove the backlight cable, use a spudger or a small flat head screwdriver to unlock the backlight cable.
  • The LCD should still be connected by the backlight cable.

    • To remove the backlight cable, use a spudger or a small flat head screwdriver to unlock the backlight cable.

    • Carefully slide out the backlight cable.

  • The LCD screen can now be fully detached from the camera body.

How to unlock the backlight cable is not at all clear. This also leads to a problem with how to reinsert and lock the cable while putting the camera back together.

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Image 1/2: LCD screen Image 2/2: LCD screen frame
  • The LCD screen and housing are now in three pieces:

    • LCD screen

    • LCD screen frame

    • LCD back housing

  • The LCD screen itself can now be removed and fixed/replaced.

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  • Remove the 1.85 mm #00 Phillips located on the left side of the camera.

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Image 1/2: Next use the tweezers to carefully remove the speaker cable off its respective holders. Image 2/2: Next use the tweezers to carefully remove the speaker cable off its respective holders.
  • Use a set of tweezers to remove the speaker located at the top of the camera on the flash unit.

  • Next use the tweezers to carefully remove the speaker cable off its respective holders.

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  • Use a spudger or a flathead screwdriver to remove the camera lens cable located in the front of the camera.

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Image 1/2: Next use a spudger or a flathead screwdriver and carefully pry out the second flash cable. Image 2/2: Next use a spudger or a flathead screwdriver and carefully pry out the second flash cable.
  • Use a spudger or a flathead screwdriver and carefully pry out the first flash cable from the bottom of the cable. The white 2 prong power cable pops UP (use spudger below red/black insertion and put upward pressure). For the yellow one, apply pressure horizontally.

  • Next use a spudger or a flathead screwdriver and carefully pry out the second flash cable.

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Image 1/1: Use a spudger or a flathead screwdriver and carefully pry off the plastic piece on top of the flash unit.
  • Gently remove the flash component from the rest of the camera.

  • Use a spudger or a flathead screwdriver and carefully pry off the plastic piece on top of the flash unit.

    • The flash unit can now be removed and replaced.

  • Be careful not to touch the capacitor attached to the flash unit as it may still be holding a charge!

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Image 1/1: 6.15 mm #00 Phillips
  • Remove four screws located on the back of the camera:

    • 6.15 mm #00 Phillips

    • 2.75 mm #00 Phillips

    • 2.15 mm #00 Phillips

    • 2.7 mm #00 Phillips

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  • Use a spudger or a flathead screwdriver and carefully pry out the bulb located in the front of the camera on top of the camera lens.

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  • Gently remove the camera lens from the rest of the camera.

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  • Remove the 2.6 mm Phillips #00 located near the shutter release button.

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Image 1/2: Gently remove the shutter release component from the camera. Image 2/2: Gently remove the shutter release component from the camera.
  • Use a prying device or your fingers to release the ribbon from its holder.

  • Gently remove the shutter release component from the camera.

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Image 1/2: Next use a prying device or your fingers to release the power trigger cable from its holder. Image 2/2: Next use a prying device or your fingers to release the power trigger cable from its holder.
  • Remove the 3.4 mm Phillips #00 located under the camera.

  • Next use a prying device or your fingers to release the power trigger cable from its holder.

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  • Use a prying device or your fingers to release the ribbon from their respective holders located at the top of the camera.

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Image 1/2: Then gently slide out the ribbon. Image 2/2: Then gently slide out the ribbon.
  • Use a spudger or a flathead screwdriver to unlock the ribbon located at the back of the camera.

  • Then gently slide out the ribbon.

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  • The whole ribbon and metal casing can now be easily removed from the remains of the camera.

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  • Use a spudger or a flathead screwdriver to release the motherboard cable.

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  • Next remove the 3.4 mm Phillips #00 located in front of the camera. wisdom here.

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  • Now the motherboard can be gently removed from the metal casing.

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Conclusion

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

Peter Tran

Member since: 10/06/2010

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Cal Poly, Team 20-7, Maness Fall 2010 Member of Cal Poly, Team 20-7, Maness Fall 2010

CPSU-MANESS-F10S20G7

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