Repairing Single-Card IGBT Welding Machine: No Output Issuebr Having trouble with your single-card IGBT welding machine? No output can be caused by various faults, including issues with the IGBT module, control board, or power supply. br In this video, we’ll guide you through the step-by-step process of diagnosing and repairing the no-output fault in your IGBT welding machine. Learn tips and techniques to get your machine back in working order.