The MK4 printer has an indicator LED on the underside of the LCD panel that lights up on the table top. Even though the light is reflecting off the table top, it seems quite intense to me. That's why I printed a cover for the LED to reduce the light intensity. After putting on the white PET cover, I am satisfied with the intensity of the LEDs. You don't have to disassemble anything, just insert the cover into the hole on the bottom of the LCD panel.