If you have a slingbox 500 connect a second hdmi cable from the adapter to your tv in order to enjoy the on screen interface for program discovery.
Component cable for set top box.
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Connect the hdmi cable from your set top box to the adapter.
If your cable box has component connections the first thing you may want to do is contact your cable company and see if there is an upgraded box available.
If you are using component cables to connect your set top box to your television you will need to use a digital coaxial audio composite stereo audio or digital optical audio toslink.
Component cables support both standard definition sd and high definition hd video signals on motorola dch or dcx set top boxes but does not support audio.
As cable service providers continue to convert to all digital and scrambled service those that own older analog and even newer hd and 4k ultra tvs that you may have used to receive cable service without a box will be required to have a box in order to access basic cable channels.