The Carl Baasel RFD‑27 Laser Drive is a high‑power industrial laser control module that interfaces with the laser head, power supply, and cooling system to regulate beam output and pulse parameters. Common failure modes in this class of drives include overcurrent protection tripping due to faulty MOSFETs or gate drivers, loss of communication from the host controller caused by damaged serial/USB lines, and overheating of the internal PCB from inadequate heat sinking or fan failure. First‑check diagnostics should verify that the main power supply is delivering correct voltage rails (typically +12V, +5V, and laser drive high‑voltage), confirm all I/O connectors are intact and free of corrosion, and review any error codes displayed on the front panel or logged in the control software for indications of component failure.[oss-gpt-20b]