What happens next?

How to fix cable tv 
Turn off then turn on your device. 
It is possible that your dvr or cable box may have malfunctioned and requires a power cycle. On the device itself hold the power button for ten seconds to shut it off.

Options are:
[A]. If you absolutely cannot find the power button after ten seconds, it is likely that you have tried turning the device off. Again, follow the same procedure if you can't find the power button.
[B]. This is especially important for adapter adapters which commonly require a power cycle to properly find broken cables. Inspect cables to make sure they are not damaged or slightly twisted.
[C]. Make sure all the channels on your device are turned off. If you are not sure which channels on your device turn off it may be because the cable box is not being turned off properly.
[D]. It it continues to not turn off, you can unplug the power cord from the power outlet for 15 seconds then plug back in and wait 30 seconds. Press the power button to turn the device back on.
[D].