The Haemonetics PCS 2 Driver Board is an integrated control module for the PCS 2 plasma collection system, handling pump actuation, optical sensor inputs, and communication with the data box or internal card. Common failure points in this class of driver boards include degraded power‑rail regulators, burnt‑out MOSFETs on the pump drive outputs, and corrupted firmware stored in the onboard flash memory. Initial troubleshooting should verify that the board receives its rated input voltage (typically 24 V DC) and that all connector pins are free of corrosion or mechanical damage; check for any visible burn marks or swollen capacitors on the PCB. Next, review the system error log for codes related to pump failure or sensor timeout, then perform a continuity test on the pump driver traces and confirm the I²C/SPI interface is functioning before attempting firmware re‑flash if needed.[oss-gpt-20b]