My security system is a few years old. My entry sensors have always lit up blue and chimed when I open the door. Here recently the base stopped chiming. I thought it was an issue with the sensors, so I replaced the batteries in them. It didn't help. I unplugged the base, took out the batteries, put

My security system is a few years old. My entry sensors have always lit up blue and chimed when I open the door. Here recently the base stopped chiming. I thought it was an issue with the sensors, so I replaced the batteries in them. It didn't help. I unplugged the base, took out the batteries, put