Missing Close Captioning in analog Sony Trinitron

The Comcast set top boxes only allow 1 type of CC. However your TV is programmed to handle 4 or 5 CC features. Go into your TV menu and find your CC options there should be different ones there choice 1 you like.

The Comcast boxes let you enter a special menu only when the box is turned off. Just turn off the Comcast box and press the menu button on the remote you will then see a menu for the box where you can turn on and off close captioning

have you tried to turn on again the close caption in the set up menu.

These are the codes to check. 10000, 10011, 10273, 10353, 10834, 11317, 11400, 11685, 11786, 11791, 11904, 11925

check your close captioning settings make sure they are off you probably are accessing an unused cc chanel

I have the same T V and i used the code 11100 and it worked . Give this a try and it should work. for T V Sony Bravia lcd

The TV will not display closed caption with HDMI input. It must either over-the-air (antenna) or composite input for the TV to manage CC.

To get CC with HDMI from your Comcast DVR, you need to configure the cable box. Instructions can be found here:
http://en.wikibooks.org/wiki/How_to_use_a_Motorola_DVR/Setup

If you want CC all of the time, this works well. But since you must power-off the cable box to change the setting, switching CC on and off is a real pain.

Your set-up is similar to mine (Sharp Aquos 46" and Comcast DVR). I have the composite output from the cable box going to a DVD-recorder and on to the TV. Whenever I need CC (usually to catch some mumbled dialog), I just rewind the DVR, and switch the TV input to the composite input. Then I switch back to HDMI to continue watching in HD.

Well first you can view your TV's manual at
http://www.sylvaniaconsumerelectronics.com/pdf/om/LC320SS9.pdf

Go to page 24 through 27.

IF that does not help you, comment me back.

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Had this happen on a Comcast box (Motorola DCT 6416 III)
Here's how to fix it:
Turn the cable box off, leave fully connected. Press Menu on the remote
The cable box internal menu will display (Not the Comcast one the Motorola one-- i.e. Display ratios-16:9 etc It's in black and white)
Use the arrows to cursor to the Closed Captioning and toggle to "Disabled" Press Manu again to exit and Voila!

Power the box on an have at it

I had the same issue... here's what I did.  If power off your cable box, then press the menu button, there's a selection to enable or disable Closed Captioning.  This works for both HD series Motorola boxes Comcast offers, at least in the Minneapolis/St. Paul area.  Hope this helps!
Evan