Maybe 5 yr. Old sanyo flat screen hooked to older vcr via red white and yellow plugs. i have no cable tv only my vcr..worked beautiful till today when I unplugged to try another machine which didn't work..then when I reconnected first machine again there is no connection. Tv not recognizing the hook up. I changed nothing and there is only the 3 colors that match up with tv and vcr...why will it no longer connect ? Appreciate any help...no tv...no movies..long night !!