The Antex LX‑44 is a 32‑bit PCI digital audio adapter designed for professional PC audio workstations, offering 4 channel input and 4 channel output with balanced analog I/O and high‑resolution converters. Common failure modes include capacitor or solder joint degradation on the main board (often due to vibration or thermal cycling), worn or damaged XLR/25‑pin connectors, and driver conflicts that manifest as audio dropouts or no sound. For initial troubleshooting verify the PCI bus power supply (5 V and 3.3 V rails) and inspect the card for burn marks or loose components; test the analog outputs with a multimeter to confirm proper voltage levels; and review Windows event logs or device manager for driver errors before proceeding to component replacement.[oss-gpt-20b]