HAS ANYONE SEEN A CF435 CODE ON THE 1815 WHEN SENDING PRINT JOBS?

One of our machines had that the other day, customer rebooted and it went away, this machine is connected parallel. The Operators Guide has that code it appears like CF..... I guess that means any number following, replace main board.

Hello,

CF435 means a cable problem. there is a new firmware to solve this problem.