Many new homes are installed with a home security system when they are built and there are millions of older homes that have been retrofitted with systems as well. But some of those home security cameras might be at the point at which they should be replaced as should some of the interior monitoring systems that have been in place for a few decades. Nothing lasts forever and even though modern security systems are often very high tech, even these modern theft deterrent systems need to be looked at on a regular basis to avoid