Intermittent NMI Errors When Reading From Floppy

This Field Change Order (PB22H-0001) addresses intermittent Non-Maskable Interrupt (NMI) errors occurring during floppy disk read operations in certain DEC2000 AXP (DECpc-150 AXP) systems. The issue is linked to CPU module part number 54-20674-01 at revision levels E03 and below. The solution is to swap the existing CPU board with a revision E04 module. The document provides detailed instructions for system shutdown, cover removal, ESD safety precautions for handling the module, and the step-by-step process for replacing the CPU board and reassembling the system.