LCD technology holds a multitude of advantages over the previous standard for computer screens, the CRT. Liquid crystal displays are lighter, smaller and more energy efficient. But there is one particular weakness with an LCD screen that was not an issue for CRTs. The LCD screen is especially fragile and easily scratched. Even cleaning an LCD screen improperly, or using the wrong type of cloth, can scratch and mar the surface of the display. Many scratches on an LCD screen can be repaired, however, even if the scratch is fairly deep.
Clean the screen completely of all fingerprints and smudges. All residue and debris must be removed to avoid adding additional scratches. Use a soft anti-static microfiber cloth dampened with a small amount of 50 per cent diluted isopropyl alcohol and water mixture, or a cleaner designed for LCD screens. Do not use a cleaner designed for glass or other surfaces. Do not over saturate the cloth or spray the solution directly on the screen. Excess moisture can leak around the corners of the screen and damage electrical components. Gently wipe in a circular motion; do not press to hard. Allow the screen to dry before continuing.
Place a small amount of vaseline in the centre of the scratch. Work the vaseline into the scratch with your finger, adding more vaseline if needed. Only a small amount will work for most scratches since the excess will be wiped off later. Fill the scratch entirely with vaseline.
Use a clean microfiber cloth to buff the area around the scratch. Use a circular motion while working along the scratch. The idea is to remove any excess vaseline from around the area of the scratch, without removing any from inside the scratch. Do not press too hard since you may remove the vaseline from the scratch or even damage the screen. Continue until the film of vaseline is removed from the screen.
Repeat the procedure any time the screen is cleaned. Cleaning the screen will remove the vaseline coating from inside the scratch and it will need to be reapplied. This repair doesn't fix the scratch completely, but it does mask it so that it is no longer visible.
There are other methods of fully removing a scratch from an LCD by buffing down the surrounding layer of antiglare coating to match the depth of the scratch. This is done by using abrasive substances, such as Brasso polish, baking soda toothpaste or a clean pencil eraser. These solutions can cause serious damage to the screen if performed improperly, and should only be attempted by a professional.