Nordson 1123951A01 is a main control board for the company’s industrial gluing systems, typically mounted on the gluer chassis to drive servo motors, dispense units, and monitor process parameters. Common failure modes in this class of boards include power‑supply voltage spikes damaging ICs, degraded solder joints or cracked traces causing intermittent communication with the PLC, and overheating of the main processor due to inadequate cooling. First‑check steps: verify 24 VDC rail integrity and look for brownouts; inspect the board for visible burn marks, corrosion, or broken vias; confirm that all I/O connectors are seated and free of debris; then review any stored error codes from the system log for clues to a specific component fault.[oss-gpt-20b]