Simplex panel all card Missing

I use simplex 4100 es, Here problem is suddenly panel show all card missing, now panel is running but no device respond.Please help me in this regard …
tofayel

This is a critical situation. Your system is unable to sense or respond to a fire emergency.

  1. You need to place a system down service call with your service provider so a technician can diagnose and repair the system.

  2. You need to immediately start a fire watch and continue that until the system is repaired.