A couple of points to bring out on this, which may or may not be pertinent.
Question, was that house, and Suzie's room, equipped with cable ? Personally I grew up in a house that hasn't had over the air broadcasts since the mid 70's, but the HD conversion of recent has enlightened me to how many holdouts there still are out there to 'over the air' broadcasting.
A TV set (today or 80 years ago) is merely a monitor, it projects whatever signal you put in it. Static *IS* really nothing, period. A black screen, or some other color, color bars, anything, which most of us might see a 'nothing' is still a video signal of some sort. As many of us may recall, in the old days when using the VCR, we were told to turn the TV to channel 3 or 4, whatever one is not in use in our market, which in this case would be channel 4 (avoiding interference from KY). You get static, until the video tape is picked up. When the tape comes out, back to static...UNLESS you have cable, then it defaults to the TV settings. Many modern VCR's will go to a blank slate.
If the girls were watching a broadcast channel, I'm suspecting it's possible. In 1992 I was in a small media market, and we even had a station or two broadcast 24/7. When I came to Springfield a couple years later, I think all the affiliates were 24/7. On a Saturday night, at this hour, would be slim pick'ins, but some old obscure movie or an infomercial, is possible. But, by 9 AM on a Sunday, just about ANYWHERE in this country, an active broadcast station would have had something on the air then, or a slate of their ID. Therefor, it would appear, that house didn't have cable and the girls were watching some tape. I suspect the tape was taken, for whatever reason.