If the Canon PowerShot G9 displays a card error "write locked", it could be simply the switch in the SD-card slot not working.

  • Good eyesight and a steady hand is necessary to complete this.
  • Be especially careful not to rupture any of the flex cables.
  • Work slowly
  • Keep the screws sorted, they have different sizes
Be very careful not to touch any charged flash capacitor.
  • Be very careful not to touch any charged flash capacitor.

  • Remove screws as marked. 2 for strap holder, 5 for back cover

  • Remove Back cover and strap holder

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Remove two screws
  • Remove two screws

  • Remove buttons

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  • Disconnect ribbon cable by lifting up flap

  • Disconnect other cable (another flap)

  • Remove jog dial unit

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  • Remove one screw

  • remove finder dial

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  • Remove screw and lift LCD upwards very carefully. Do not put any strain on cables

  • Carefully remove flex cables. The left has a flap that needs to be opened (up), the right just needs to be pulled out. Be careful when re-inserting the right one, you can easily damage the fragile cable.

  • Remove LCD

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  • Remove screws

  • Disconnect connectors for Lens assembly

  • Carefully disconnect the tiny cable

  • Next step is removing the PCB. I made the mistake not to take care about the battery compartment switch. If you are not careful, the black lever will break off. Not a problem though, because then the camera will work also with opened battery compartment

  • Remove main PCB by slightly bending outward the cover for the jack with fingernail. Now lift the PCB slightly upwards.

  • Look under the PCB, there is a connector that needs to be separated by means of a small screwdriver or spudger.

  • Re-attaching the connector is not easy. I used a small screwdriver to carefully press the connector back in place.

  • Note: This is not the official method to do this. Normally the Top cover and several other parts need to be removed too.

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  • Measure continuity on SD-card slot write protect switch

  • If it is not working, short the two points with a bodge wire, so write lock is disabled

  • Another fault is a broken soldering joint holding the case of the SD-card reader in place.

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Arbeite die Schritte in umgekehrter Reihenfolge ab, um dein Gerät wieder zusammenzubauen.

Thomas Widmaier

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