1inch horizontal bar of picture running across TV screen.?

There is a solid line about an inch wide running horizontally across the middle of my Sylvania 6724FDG TV. I feel like its just that my kids have messed with the picture settings and was wondering if there was a way to reset it to factory settings or something like that. Or if it's a more serious problem :(|||Is this an older CRT tube type TV? Sounds like you are losing your deflection circuitry or voltage. The repairs may not be cheap... Maybe time to look at a new TV.. (Flat screen.)|||OK, go find the user manual that came with the TV and see what it says about factory resetting. What TV is this anyway?