When the battery power is low and the voltage is low, the LCD backlight will flash. Rust on the power switch can also cause the backlight to flicker or cause the LCD screen to fail to turn on. While the game is loading, black shadows will appear around it. This is a normal phenomenon of our LCD screen, and the longer the loading time, the more obvious it is. For installation methods, please refer to the link for the separately sold LCD screen. The shell in the package does not need to be cut. New sterling LCD screen. Easy to install 2.6-inch original size IPS high-brightness LCD screen, suitable for Nintendo Gameboy pocket - If the touch is not sensitive and cannot be touched, please turn the metal side outward Glossy shells are more difficult to make than matte shells. It is normal for the shell to have some mold marks.