Hyster B‑1244‑4 is a printed circuit control board used in Hyster forklift drive and power‑train systems, typically handling 24 V DC motor control signals and relay driver outputs. Common failure points on this class of boards include burnt or cracked surface‑mount components (especially MOSFETs and voltage regulators), solder joint fatigue at high‑current traces, and degradation of protection diodes under over‑voltage spikes. First‑check diagnostics: verify the 24 V supply rail is within spec; inspect for obvious burn marks, loose connections, or corrosion on I/O headers; and review any diagnostic codes from the forklift’s onboard ECU that reference drive‑control faults.[oss-gpt-20b]