Sokki Electronics DU202 is a digital read‑out display unit used in precision measurement and industrial control systems. Common failure modes for this class of units include power supply degradation (brown‑outs or voltage spikes), LCD panel backlight failure, and internal controller IC faults due to over‑temperature or moisture ingress. First‑check diagnostics: verify 24 V DC input with a multimeter, inspect the display for visual defects such as dead pixels or backlight dimming, and review any error codes or LED status indicators on the front panel. If power is present but the screen remains blank, test the main controller board continuity and replace any damaged capacitors or diodes before proceeding to component level repair.[oss-gpt-20b]