Thank you for writing back with that information.
Since you are using an HD TV, the cord that you are referring to could be an HDMI cable/cord. But you need to check this yourself in the TV port and in the DirecTV port to see if it is indeed an HDMI cord that you need.
Here are the links for an HDMI cord that you can buy online:
<< HDMI Cable Option 1 >>
<< HDMI Cable Option 2 >>
The second option for HDMI cable above has vivid pictures so please check if that kind of port will fit into the HD TV and into the DirecTV Receiver that you have there.
Another thing that you need to check is, since you mentioned that the cord connects to an "orange" port, then it could be an RCA cord that you need. This port is circular as compared to an HDMI that is rectangular.
Here is a picture of sample DirecTV Receiver:
There you can see both an HDMI port where the cables in the above links will work, and there is a orange port too which is an RCA. If that is the same orange port you are referring to, then you need this cord in this link:
<< RCA Jack/Port Cord>>
I hope that helped.
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