hi bought a 4kus dvd recorder at amazon picture jerky through scart to tv now when plugged into tv no picture ,nothing viewable i have sky going into dvd recorder/out dvd recorder to tv all worked o.k for just over the warranty period now nothing ,put sky into tv through scart perfect so its not sky, plugged back in with new scarts nothing tried rgb leads nothing is this unit broke ? the 4kus is a re-badged liteon dvd recorder one of the basic ones thanks from john