Introduction
This guide is a step-by-step process on how to replace the zoom lens on a Casio Exilim EX-Z850 camera. This will help you replace it if it is broken or damaged, and there are no special skills required for this project.
Tools
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            With tweezers, flip open the connector holding the ribbon. 
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            Pull out the LCD screen with the ribbon from the camera. 
 
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            Remove two screws on the side where the battery is located. 
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            Remove the lanyard loop after the screws come off. 
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            Slowly pull the side casing so it becomes dislocated from the top of the camera frame. 
 
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            On the front of the camera near the flash flip the connector holding the ribbon. 
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            Carefully remove the ribbon from the connector. 
 
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            Carefully remove the L shaped frame from the camera. 
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            At the bottom of the camera the L shaped frame is being held in by two plastic bumps and a metal tab. Pop the frame off the bumps and tabs. 
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            There is a yellow and orange wire soldered onto the camera. Be careful not to pull them off. 
 
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            On the logic board next to the lens is a connector with a ribbon. 
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            Flip the connector and remove the ribbon with the tweezers. 
 
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            Remove the frame on the back side of the camera where the LCD screen was. 
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            With the screwdriver, remove the two screws connecting the frame with the camera 
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            Slowly pry off the frame from the camera 
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            After removing the frame a plastic piece with two yellow button connections should fall off. 
 
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            On the back of the camera where the LCD screen was, remove the 3 screws located behind the lens. 
 
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            Remove the large orange ribbon previously held in by screws from the camera and set it asside. 
 
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            On the backside of the camera where the indicator lamp is located, remove the two screws with a screwdriver 
 
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            On the side of the indicator lamp remove a screw. 
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            On the front side of the indicator lamp remove the a screw. 
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            This should remove the indicator lamp from the lens. 
 
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            The lens is now detached from the camera except for the ribbon soldered onto the logic board. 
 
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To put the Casio Exilim EX-Z850 camera back together, reserve the instructions to follow them in a backward manner.