Be it a MacBook Pro, MacBook Air, Mac mini, or an iMac.If your mac hassent been damaged by fall and you are sure that it hasn't been broken but your screen is. But my mac Book Pro 13 inch laptop, the keys and everything on it are not working. The Apple Macbook Pro would turn on, but the screen would not.Also, any USB device plugged in into the left port is not being recognized by the operating system. It feels like something inside the USB port is staying on the way. Any USB device plugged in into the left port doesn’t fit all the way in. The left USB port on this MacBook Air stopped working properly.