The HAAS Automation 65‑4075G is a power distribution board (PSUP‑G) used in VF2 and related CNC machines to provide regulated AC/DC output to the control cabinet. Common failures on this model include degraded electrolytic capacitors (especially the 470 µF/400 V units), burnt or cracked voltage regulator ICs, and broken or corroded PCB traces around the main power input; overheating from inadequate ventilation can also cause component failure. First‑check diagnostics: verify that the board receives proper line voltage and measure output rails for correct regulation, inspect visually for bulging capacitors, discoloration, or burn marks, and test continuity of critical paths (input to regulator, regulator to output). If any anomalies are found, replace suspect components or reflow solder as needed.[oss-gpt-20b]