The Metcal MX‑500S‑11 is a dual‑port bench‑top soldering/rework station that uses SmartHeat® cartridges to maintain preset idle temperatures automatically and includes an integrated power meter for real‑time wattage readout. Known failure modes on this model include cartridge overheat or self‑regulation failure (often indicated by a “cartridge fault” LED), power supply dropout or voltage ripple causing erratic temperature control, and display or microcontroller glitches that can lock the unit in a standby state. First‑check diagnostics should verify mains voltage and continuity to the AC input, inspect the cartridge for scorch marks or loose connections, and review any error codes displayed on the panel before proceeding with deeper troubleshooting.[oss-gpt-20b]