Data‑Ray DR5614 is a 14″ color CRT display originally designed for Mazak/Mazatrol and Mitsubishi CNC control panels, often mounted inside machine tool enclosures. Common failure modes on this unit include flickering or loss of image due to degraded phosphor tubes, power supply capacitor failure, or burnt-out backlight/CRT tube; the monitor’s internal fuse and power regulator are also frequent points of failure in long‑term industrial use. For troubleshooting, first verify the 12 V DC input voltage at the monitor connector and check for any blown fuses or tripped regulators on the front panel; next inspect the CRT tube for visible cracks or bulging, and test the backlight driver by measuring output current to the lamp; finally review any error codes displayed on the CNC controller that may reference the monitor’s status.[oss-gpt-20b]