History Codes B335, B336, B337

This combination of History Codes could be caused by:

^ Two opens in the Data Circuit isolating the CRTC, Programmer and IPC from the BCM, and at least one of the opens is momentary. One of the opens would be in CKT 800E, including the programmer and the other open would be in CKT 800H, including the IPC and BCM.