I HOOKED UP MY OVERHEAD MONITOR TO VIDEO INPUT 1 ON AVICF900BT AND DID BYPASS TO SYSTEM, BUT CAN NOT FIGURE OUT WHY IMAGE FROM OVERHEAD COMES AND GOES. I HAVE SOUND FROM OVERHEAD BUT NO IMAGE.. COMES AND GOES. ANY FIX OR INPUT?

I HOOKED UP MY OVERHEAD MONITOR TO VIDEO INPUT 1 ON AVICF900BT AND DID BYPASS TO SYSTEM, BUT CAN NOT FIGURE OUT WHY IMAGE FROM OVERHEAD COMES AND GOES. I HAVE SOUND FROM OVERHEAD BUT NO IMAGE.. COMES AND GOES. ANY FIX OR INPUT?

might be a loose mute wire