Hi

I have an LG Smart TV (2015, model 49UF770V) hooked up to a Sky decoder, connected to a Denon AVR using HDMI. The AVR is then connected to the TV's ARC HDMI port. It's the standard, small Sky box (new, but not their HD one)

My LG remote (Magic Remote) is able to control various devices once you tell the TV what kind of device (i.e. brand name and model) you're trying to connect. The trouble is, I haven't been able to determine those details - there are no apparent markings on the Sky box. The only thing that looks like a brand name is 'DVB' stamped on the rear. I tried the obvious guesses when trying to setup the LG remote to control the Sky box, but none of them control any aspect of the Sky transmission : channel, volume etc. 

Is what I'm trying to do even possible? 

Would love to get rid of that clunky Sky remote!

Matthew