Siebert S302‑03/06/0R‑100/0B‑K0 is a three‑digit red LED numeric display module rated for 24 VDC operation and commonly used as an indicator or readout in industrial control panels. Common failure points for this class of displays include burned‑out LEDs, damaged driver ICs, and degraded power supply filtering; the module’s internal LED array can also suffer from shorted segments due to moisture ingress or mechanical shock. Begin troubleshooting by verifying a stable 24 VDC supply at the display terminals, inspecting the LED segments visually for discoloration or burn marks, and checking the driver board for blown fuses or damaged capacitors before proceeding to I/O interface diagnostics.[oss-gpt-20b]