I got a Sony Trinitron on craigslist for 50.00 dollars. I hooked it up to the caple dishnet that is in the room, then turned it on. There was only snow and the only thing that it did say was no signal. Does that mean I need to do something to the resever down stairs, or is there another problem? The tv is a 2001 make the model is KV-27FS12 and the ser. # is 8271772. What do I do next?