Cable boxes decode an encrypted signal from the cable service provider prior to transmitting a television picture to a display. Connect a monitor switching box to a high-definition cable box so that the TV picture can be watched on a computer monitor. The monitor cable box, which can be acquired from a computer store or electronics shop, will let you switch between the desktop and live television. The process is straightforward and will not negatively affect the computer, monitor or cable box in any way. Tips Warnings Writer Bio
