im trying to hook up a samsung flat screen with all input componets andmaganox dvd vcr recorder how do i get the hdmi imput (a

You can't record from the TV since the TV has no video output.
If you want to record you would need to connect the source (set top box for example) to the av inputs on the recorder. If you are trying to record from ova broadcast you would need to buy a digital converter that would tune the channels. You would not be able to change those channels from the VCR but could set the time.
You could get an OVA tuner with built in DVR and HDMI out. then ditch the VCR for recording. That would allow for an HD recording which will look much much much better
https://www.amazon.com/ViewTV-AT-300-Converter-Recording-Composite/dp/B01MF9X5V9/ref=sr_1_18?ie=UTF8&qid=1501960116&sr=8-18-spons&keywords=tv+dvr+recorders+no+subscription&psc=1