Probably a noob question! You said to disconnect the LAN cable. Do we have to even if the modem is switched off and relevant plugs are pulled from the socket?
Also with regard to the video, can you let us know how long can you use a branded power supply? I have been using my Antec PSU for bit over six years. It works fine still, but i bought a new Ryzen system recently, so just wondering whether that's okay for new components.