The Accurpress AP2 CPU board is the central control module for a 15‑plus year old Accurpress machine, typically handling motor drive logic, I/O interfacing, and communication with the operator panel. Common failure points on this class of industrial controllers include degraded power supply rails (especially Vcc and ground), burnt or tripped protection diodes, failing MOSFETs in the motor driver section, and broken or corroded I/O traces that cause intermittent communication errors. Start by verifying the board’s input voltage and decoupling capacitors for correct levels; inspect the PCB for obvious burn marks, cracked solder joints, or damaged components; then check the status of all diagnostic LEDs and read any error codes from the machine’s HMI or PLC interface.[oss-gpt-20b]