Introduction
Use this guide to replace a shattered or malfunctioning display on your Microsoft Lumia 950 XL phone.
Your screen may need to be replaced if the glass cracks or can no longer register screen-touch capabilities. Uneven lighting and colors or screen burns can also be a cause for replacement.
To start, power off your phone completely and disconnect it from any external power sources.
Tools
Parts
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            The Lumia 950 XL back cover is super easy to remove. There is a dent at the bottom of the phone to guide you to where you should start working. 
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            Crack the back cover open using your fingers. 
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            Lift the battery out using your fingers. 
 
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            Unscrew the 12 Torx screws (T5) in the back panel. 
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            Lift the back plate from the bottom of the phone. 
 
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            Now that the back plate is off, it shows various interesting components like the heat pipe, earpiece & loud speaker. 
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            Remove the headphone jack connector using a spudger. Then lift using a tweezer. 
 
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            There are three connectors that need to be disconnected before working with the motherboard. 
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            With a spudger, remove the first two connectors. 
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            Another small connector is connected with the side buttons. Again, disconnect them using a spudger. 
 
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            The motherboard is clipped with the back of the display panel. 
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            Start working with the top right of the phone. Remove the motherboard from the clip by hand or use a Jimmy to leverage in little force to make it easier. 
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            Use tweezers to lift the motherboard up. This may require a little force since this part of the board has little clips underneath. 
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            Continue working with the motherboard all the way around till the bottom half of the phone. Straightforward! 
 
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            One last connector needs to be disconnected on the back of the motherboard. 
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            Start by peeling of the sticker beneath the battery. 
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            Lift the motherboard up, starting from the bottom of the phone, and flip it gently. You will see the hidden connector. 
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            Disconnect it with a spudger 
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            Now the motherboard can be removed. 
 
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            Remove the two connectors that connect the daughter board with the motherboard. They are lightly adhered in place and can be peeled off easily by hand. 
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            Remove the daughter board by using a spudger. 
 
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            Remove the vibrating motor using a spudger. 
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            Remove the side panel with a spudger. It is lightly adhered but can be lifted by fingers or a tweezer. 
 
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            Start the assembly process by placing the daughter board into the new screen 
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            Place the vibrating motor back into its place. 
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            The new screen should come with a light adhesive to hold the two cables from the daughterboard. 
 
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            Reconnect a connector on the back of the motherboard, clipping the board in place. Start with the top right corner of the phone and push the motherboard into the clips using a spudger. 
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            Reconnect all 3 connectors. 
 
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            Place the headphone jack and connect it to the motherboard. 
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            Reapply the sticker beneath the battery 
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            Place the back panel on top of the motherboard, and screw in all 12 screws! 
 
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Thank you for following us. This is a complete disassembly - replacement - reassembly guide. So, your phone should be working normally again!