Need Help! Fanuc Power Mate D A20B-2100-0030

Dear Sirs

Machine was working fine, we had taken out complete CNC just to clean up from dust. By Mistake one of our workmens taken out add on cards viz PMC A20B-2901-066, RAM & Serial Spindle A20B-2902-022, CRT Module A20B 2901 0480

Now when we switch ON, we get ROM Parity check OK, Waiting for CRT data

Please explain reason for Waiting for CRT data and action to overcome this error

Also please let us know if PMC A20B-2901-066 has got the ladder which got deleted/erased as it was removed from Main Board ?

Regards,

M. Rishikesh