Sylvania tv model # ssc719c

I had the same problem programming my directv remote to recognize the ssc719c. What finally worked was programming AV1 (not 'TV') with the sylvania DVD code 20821. This allowed me to turn the tv on and off and change tv channels, but wouldn't allow me to mute or change the volume. To fix this, (at least in my case) you have to program your remote to recognize the volume and mute buttons in the AV1 slide setting. I assume other (non directv) remotes similarly disable the volume and mute buttons when the remote is not in satellite or tv mode. Anyway, here are the instructions that activated the volume & mute buttons on my remote: "Depending on how you set up your remote, the VOL and
MUTE may control the volume only on your TV, regardless
of the position of the MODE switch. This remote can be set
up so that the VOL and MUTE keys work only with the
component selected by the MODE switch. To enable this
feature, perform the following steps:
1. Press and hold the MUTE and SELECT keys until the
green light under the DIRECTV position flashes twice,
then release both keys.
2. Using the number keys, enter 9-9-3. (The green light
will flash twice after the 3.)
3. Press and release the VOL+ key. (The green light
flashes 4 times.)
Now the VOL and MUTE keys will work only for the
component selected by the MODE switch position."

To sum up: if you find a code for your remote that will turn your tv on and off, but doesn't seem to do much of anything else, it's probably the right code; your remote is probably set up not to recognize volume or mute inputs in AV1 or AV2. You change that using a remote-specific code that's probably found somewhere on the remote maker's website.

I had the same problem but I tried using the TV code instead of the tv/vcr code and it worked fine.

Has this univeral remote worked with your unit before at all ? Some combo units are very hard to operate with universal remotes. I learned a long time ago a very good lesson: get original remote for combos to avoid headaches. I can almost guarantee you the problem is not with your remote receiving circuitry.