safely is easy enough, i'ts just a cable , it won't electrocute you - but do you REALLY need to remove it and not just conceal it instead. it is far more hassle to put it back again if ever you change your mind ?
returning the box is a fun filled epic saga, for many people
expect one reply saying we don't want it back - just recycle it, then 2 threatening emails saying return it or we'll bill you, expect to make 3 or more calls to say so where';s the packaging then and to get 4 or more of " it's in the post"....
IF you are removing the cable then the open end needs to be capped of to stop any possible noise ingress into the local circuit.
i would have thought that leaving the cable in place but going to an empty space where the 2nd tivo box used to be would attract more noise than removing it. a long un-terminated run acts as an antenna ?
what gizmo should the OP buy , and from where, to do a DIY capping thing ?
The silver caps should be provided by Virgin Media. They should be sent with the return packing, assuming it ever turns up. They are small and easy to miss in the box but also are often missed out. The Virgin Media team will send some if requested.
The caps have a built in 75 ohm resistor to properly terminate the cable. They do not just keep out dirt. Unterminated cables can not only allow noise pick up, but they offer the wrong impedance to the incoming signal risking distortion and lowering of power levels at nearby equipment. If you still have Virgin Media equipment, you are the one who will be most vulnerable to problems.