It isn't a software problem, its hardware, it has to be coincidental to the update.
127-311 RAP
BSD-ON: CH3.7 ESS
ExtPRT
Procedure
This Fault Code may occur in the following situation:
• When the Controller can detect commands but cannot detect input video, data, or clock.
To recover, check cable connections.
Shut it down and re-seat every single cable on the printer then boot up again.