The Sokki DU102F is a discontinued X‑Y axis digital read‑out display designed for industrial process control, rated at 85–264 VAC and 50/60 Hz. Common failure points in this class of units include burned or cracked LCD panels, failed backlight LEDs, and power supply board faults such as blown capacitors or damaged voltage regulators; the integrated controller IC may also be susceptible to over‑voltage spikes from the input line. First‑check diagnostics should begin with a visual inspection for obvious damage, verify that the 120/240 VAC input is within spec and that the unit’s internal fuse (if present) is intact, then confirm that the display receives proper logic signals by checking the I/O pins against the reference schematic; finally review any stored error codes or LED status indicators to isolate a specific module failure.[oss-gpt-20b]