Recording on a DVD/VCR combo

I have a Magnavox DVD/VCR combo model # DV225MG9. The manual says that it has has no internal tuner. I want to know to hook it to my digital cable box so I can record off the TV. I hooked it up it will play tapes and dvds. But when I push record on the vcr it lights up. But I try to play the tape back there’s nothing but a blank screen.What am doing wrong? Can someone help me?:confused:

Connect it directly to the cable box. When the cable box is tuned to the appropriate channel, it will record that channel.

You have the output of the DVD/VCR hooked up to the TV so you can see videos, but you need to hook the input of the DVD/VCR to an output of the cable box.

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