Originally Posted by
Ferral
Make sure you have the lead in the correct port on the back of the machine, there is standard RF and also a yellow connector (forgot the name but it is where you have yellow for vid and red / white for L&R Audio).
The control box, if you look at it you will see that one side when switched over will point to an empty input (used for rooftop aerial input) so switch it to the side that is hard wired in.
On a modern flat screen you need to tell the TV to search for analog signals not digital and it should be just fine with the old CRT.
Also make sure you have a game in there when you turn it on so you have a reference point once it actually finds something to eventually fine tune, if there isn't a game in there you get just a blank / black screen.
I would suggest buying a scart lead from Cool Novelties or Retro Gaming Cables looking forward.