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Use this guide to remove a broken flash unit from your Canon PowerShot SD870 IS.
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            Remove the wrist strap, if present. 
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            Remove the lithium-ion battery. 
 
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            Remove the two 4 mm Phillips #00 screws on the bottom of the camera. 
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            Remove the screw next to the wrist strap attachment. 
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            Pull up the “A/V OUT DIGITAL” cover and remove the screw above the USB port. 
 
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            Carefully unhook the “A/V OUT DIGITAL” cover from the hinge. 
 
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            Pull the front cover from the camera by using gentle upward pressure. 
 
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            Remove the two Phillips #00 screws from the flat end of the camera. 
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            Remove the black L-shaped side cover plate. 
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            Remove the silver u-shaped retainer plate. 
 
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            The first screw that needs to be removed is located on the bottom of the camera, on the left hand side. 
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            Using a Phillips #00 screwdriver remove the 0.133in silver screw on the bottom left-hand side. 
 
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            The second screw that needs to be removed is located on the top of the camera. 
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            Using the same Phillips head screwdriver, remove the last 0.133in silver screw. 
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            This will detach a silver U-shaped piece that was holding LCD screen on. Remove the piece and put it to the side. 
 
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            The LCD screen should now only be attached by the LCD data cable. 
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            Lift the screen from the right side and use a small screwdriver or other small opening device to flip the black portion of the connector upward to unlock it. 
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            Carefully slide the data cable out of the connector. 
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            The LCD should still be connected by the backlight cable. 
 
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            To remove the backlight cable, use another small opening device to unlock the backlight cable. 
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            Carefully slide out the backlight cable. 
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            The LCD screen should now be fully detached from the camera body. 
 
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            The LCD screen casing is connected by 4 claws located on the top and bottom on the left and right hand side. 
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            Carefully disengage the claws by gently prying them off one by one. 
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            Once the claws are disengaged, the back of the casing will still be connected to the front casing by the backlight cable. 
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            Carefully peel the backlight cable off of the casing. 
 
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            The LCD screen and housing should now be in three pieces: 
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            LCD screen 
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            LCD screen frame 
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            LCD screen back housing 
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            The LCD screen itself can now be removed and fixed/replaced. 
 
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            With the case and LCD screen removed, you are ready to remove the release button. 
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            Begin by using the Philips #00 screwdriver to remove two silver 0.159in screws on the top and front of the camera. 
 
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            The top plastic piece holding the release button should be held on only by a red-and-black wire connector to the logic board. 
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            Remove the connector from the logic board and detach the release button housing from the camera. 
 
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            With the plastic housing for the release button removed from the camera, use the Philips #00 screwdriver to remove two silver 0.090in screws. 
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            The release button can now be removed and fixed or replaced. 
 
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            Begin by removing two silver 0.080in screw on the left side of the camera. 
 
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            With the case, LCD screen, and release button housing removed, the broken flash unit can be removed and replaced. 
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            Begin by disconnecting the hanging flash/speaker unit from the connector on top of the camera. 
 
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            Next, gently disconnect the plastic piece on top of the flash/speaker wiring by prying open the claws on either side. 
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            The flash unit can now be removed and replaced. 
 
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
