AudioScience ASI4113 is a professional broadcast‑grade digital audio adapter that provides AES/EBU and balanced analog I/O for PC platforms. Common failure points in this class of PCI audio cards include degraded power supply rails, faulty S/PDIF connectors, and damaged internal DAC/ADC chips; overheating or mechanical shock can also cause intermittent loss of signal. Begin troubleshooting by verifying the 5V and 12V rail voltages on the card’s PCB, inspecting for burnt components or loose solder joints, and checking the integrity of the AES/EBU cables and connector pins. Next, review any error codes in the host OS driver logs and perform a loopback test to confirm digital signal path functionality.[oss-gpt-20b]