Recently my Cisco ASA 5515-X Alarm LED is up and Firewall not working even console also not working. What is the issue? Is it Hardware issue or another things? I upgraded from 9.12.3 to 9.12.4 but same issue is remaining. Could you anyone please help...

I am using two Cisco Fire Power ASA 5515-X last two years. But suddenly from last 3 month one Firewall has been hanging automatically. Nothing does work then. After reboot manually it does work. but after sometime same issue occurred again. I use asa...