Cisco ASR 920 router Reboot

[soheljujara]

Hello,

My Device Cisco 920i Router has hang and after reboot the router has came up, When im take console during hang ..im getting FPGA fail logs... 

PLs suggest what is FPGA and why my router has going hang mode ??

[Leo Laohoo]

Plug a console cable and reboot the router. 

Post the entire boot-up process.

[soheljujara]

Yes i was do that, but after few minutes again all the only port are goes down. and Cisco are suggested to replace the router.

but my confusion is, what is the exact reason to came this alarm in 920I router only ??