Introduction
This guide will explain the process of replacing a faulty screen in your Blackberry Bold 9900. It will require a near complete disassembly of the phone, but keeping that retro Blackberry alive in a world of smartphones is invigorating and worth it, right?
Tools
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Place phone screen down.
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Use your finger to life upward on the battery case.
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Pull the cover away from the battery.
 
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The Mini-SIM card is located inside the red rectangle.
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To remove the Mini-SIM Card, push and slide the card inward towards the top of the phone. It will be ejected.
 
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The MicroSD card is located where the red rectangle is shown.
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To remove MicroSD card, push the card inward towards the top of the phone then release. The MicroSD card will be ejected.
 
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Using the T5 Torx Screwdriver, remove the four torx screws that are located on the bottom half of the device
 
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Now, carefully and gently using your fingers, lift and remove the assembly from the back case.
 
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Use the black nylon spudger to pop the press fit connector up from the lower left corner of the motherboard.
 
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Lift the midframe, which contains the power/volume buttons, off of the motherboard and screen.
 
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Using a spudger, gently remove the display cable out from the motherboard.
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When it seems it has become loose enough, remove it by pinching the ribbon firmly with your fingers and gently sliding it the rest of the way out.
 
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To reassemble your device, follow these instructions in reverse order.