Updated
3/19/2012 6:57:30 PM
by
Comcast Expert
Introduction
Turning on the Closed Caption feature depends on what kind of cable box and TV you have. We’ve outlined a few of the different setups to help point you in the right direction.
Note: Audio connections are not shown in the illustrations below.
If you get Comcast service...
Without using a cable box:

You’ll use the closed captioning features built into your TV. It has nothing to do with your cable service.
With SD a DTA:

You’ll need to use the closed captioning features built into your TV. It is likely that the SD cable box or Digital Adapter is unable to send and receive closed captioning.
On SDTV with HD or HD DVR:

You can use either the cable box or the TV to turn closed captioning on or off. If you accidentally turn closed captioning on in both, you’ll see a double layer of captions.
On HDTV or HD DVR:

You’ll need to use the cable box. Closed captioning should be turned off in your TV to avoid the chance of double layers of captions.
With a CableCARD:

You’ll need to use CableCARD device to turn closed captioning on or off.