As the others have said you probably have a bad connection or two. Not only the shield shorting also an open ground will do the same. It's a real pain in the derrier when you have to put twist ons on a RG6 with a foil braid. You see the problem often lies with the dielectric insulator, the **** expands and contracts a quicker rate than the center conductor does so the shield may slip back and you lose ground. Another problem might be your power supply. If your using a single source power supply for more than one camera watch your polarity. They all have to wired exactly the same because one side of line in the majority of camera's made now is common with the shield................They all go back to a switcher, multiplexor or dvr. The shield or ground connection on the back of these devices are all common. So if you have reversed the polarity on one camera........well you figure it out + connected to - doesn't cut it even if its between 2 camera's connected to a single point with 2K' of wire. This goes also to camera's using utp cable with baluns. NEXT.........send cheque, money order or cash. ......Thank you, taking a perverbiable bow.
