Esab 38057 Rev. E is the main control board used in ESAB plasma cutting systems, handling power‑conversion, motor drive, and user interface functions. Common failures on this PCB include burnt or cracked voltage regulator ICs, degraded gate driver transistors for the high‑current MOSFETs, and broken solder joints on the 12 V/24 V power input traces; firmware corruption can also trigger lock‑ups. For first‑check diagnostics, verify that the board receives correct supply voltages (input, 5 V logic, and high‑side gate drive rails), inspect for visual signs of component damage or cold solder joints, and review any error codes displayed on the system’s HMI or logged in the controller’s diagnostic memory.[oss-gpt-20b]