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If you take your Macbook to most repair companies with a cracked display, they'll undoubtedly say you need to replace the entire display assembly and charge you some astronomical figure. It really isn't an extremely difficult procedure to do yourself however, and so we've created the guide below to show you just how to do it.
To begin, use a heat gun to loosen the double sided adhesive strip that holds the glass in place. Use caution, and heat the glass in short segments as over heating can cause damage to your LCD.With the glass heated, place a strong suction cup on the glass and pull up and away from the glass.
If heated properly, you'll be able to see a small gap between the glass and the and the rest of the display. Insert a thin piece of plastic such as a credit card or movie rental card into the opening. Work the piece of plastic in enough where it can be slid along the seem of the glass. This will break the adhesive strip holding the glass in place.Repeat this procedure along the entire edge of the glass assembly. When you meet resistance, heat the area and repeat.
Once you have used a hair dryer or heat gun to warm the adhesive strip, use a strong suction cup to begin to separate the glass from the display assembly.
To reassemble, place the LCD back in the frame, and insert the LVDS cable backwards through the opening in the bottom the display frame. Then pull the cable through the opening. You can use a plastic pry tool to assist you in routing the cable. Be very careful with this cable as it can be easily damaged.
Line the bottom of the LCD up with the bottom frame, and slide it into the groove in the bottom frame. Then make sure the 6 screw holes are properly aligned. Replace the 6 philip head screws.
Before putting the glass back on, use a cloth to glean any dust or fingerprints from the LCD and glass panel.