On the majority of MacBook models we repair the screen by refurbishing your existing display. We fit a brand new LCD panel into your original lid, so you keep your original housing, hinges and camera, and the cost stays at a fraction of what a brand new complete display assembly would cost.
Because your original lid is opened and the new panel is bonded back in, very minor traces of the work can occasionally be present, most commonly a small amount of adhesive at the edge of the screen. This is cosmetic only, it does not affect the picture or the strength of the repair, and it wipes away easily with an alcohol based cleaning fluid on a soft cloth.
A screen with absolutely no evidence of repair is only possible with a brand new complete display assembly at a considerably higher cost, and that difference is what our refurbishment price reflects. On some older MacBook models the screen is replaced as a complete assembly instead, so the above applies where your MacBook is repaired with an LCD panel replacement.