The L‑Tec PCM‑VPI is a 40 A, 230 V portable plasma cutter that shares many internal components with ESAB’s PCM‑625i series, including an AC power supply, rectifier board, and torch drive circuit. Common failure modes for this class of units are worn or corroded contactors on the power supply, failed MOSFETs in the rectifier due to thermal cycling, and degraded spark plugs or electrode contacts that cause poor arc stability. For a first‑check diagnosis, verify the input voltage and continuity across the main power fuse; inspect the rectifier board for burn marks or blown capacitors; and confirm that the torch connector is clean and the electrode is properly seated before re‑engaging the unit.[oss-gpt-20b]