The Dynapath DM30‑09B0‑728‑CLA is a 9″ amber monochrome CRT monitor used on Dynapath Delta 10/20 CNC operator panels and similar industrial control cabinets. Common failure modes for this unit include loss of image due to degraded CRT phosphor or tube burnout, power supply board faults (12 VDC regulator or capacitor failures), and display ghosting from failing horizontal deflection circuitry. First‑check diagnostics: verify the 12 VDC input voltage and inspect the power supply PCB for burnt components; examine the CRT for visible damage or discoloration and test the backlight driver if present; review any error codes or status LEDs on the panel that may indicate monitor communication failures.[oss-gpt-20b]