Altera YCK18V‑0 is an industrial FPGA development board used for prototyping and low‑volume production of programmable logic solutions. Common failure points on this class of boards include over‑voltage or ripple on the 3.3 V/5 V rails, overheating of the CPLD/FPGA die due to inadequate heat sinking, and degradation of surface‑mount passives (capacitors, resistors) from long‑term operation in harsh environments. Check first that all power inputs are within spec with a multimeter or oscilloscope; visually inspect for burned components or cracked solder joints; then review any error logs or FPGA configuration status to rule out firmware corruption before proceeding to deeper diagnostics.[oss-gpt-20b]