Ensure you turn on your cable box.
Spectrum cable box controller.
The ur5u 8780l is factory programmed to operate scientific atlanta cisco and samsung set top boxes from charter time warner and brighthouse cable.
If you have the correct codes to program your spectrum remote this method is the easiest for you.
Hold your spectrum remote control close enough to face your cable box.
So you can set a max volume on the tv and just use the cable box to control the volume up to that setting.
How to program spectrum remote to cable box using the code manual method.
The remote that spectrum supplies with the current boxes only communicates over an ir link to the cable interface.
The spectrum cable clikr 5 is designed to offer complete control for all digital hd and dvr set top boxes.
Enabling control of tv.
Designed to complement your charter spectrum cable service this remote also provides control of and surround sound audio system volume power and input functions.
But i cannot get it to work either from the remote or by hitting the volume up and down buttons right on the cable box.
It is possible that while you are trying to control your tv using the spectrum remote the option of controlling the tv is not even enabled.