Router's white Ethernet LED flashes continuously (at about 5 flashes per second)

Thanks for your input. I'm just trying to understand what's different from a week ago when I power-cycled my wireless router. Prior to that event, the "Internet" LED on my router flashed whenever anyone within my network accessed the internet. When nobody was accessing the internet that LED was steadily on, or it would flash once every 5 - 10 seconds (I assumed that was a polling function). After I power-cycled the router it has been flashing non-stop at a rate of about 5 flashes per second. Reseting it (with the reset button on the baack) didn't resolve the problem. As I said, I'm just trying to understand what's wrong/different, and what (if anything) I can do to return it to the way it worked before. Also, is this something I should be concerned about (from a security perspective)? It is not that my communications are of a high-security nature. I just prefer my communications to be private (as much as that is possible in today's world). Thanks again.