SYS ACT ISSUE IN ROUTER

[singhjudhvir3465]

I am facing sys Act Issue in cisco router 1841. Due to this link is down. Kindly help me to troubleshoot,

[marce1000]

  - Please elaborate on the issue ; from : https://ca1-gcs.edcdn.com/datasheets/Overview-of-Cisco-1800-Series-Routers-Modular.pdf?mtime=20151217164727/1000
    >...SYS ACT Green Blinking when any packets are transmitted or received on any
         WAN or LAN, or when monitoring system activity.

              - If you are experiencing other problems, then explain them  . not also that the product is no longer officially 
                supported : https://www.cisco.com/c/en/us/obsolete/routers/cisco-1841-integrated-services-router.html

   M.