The Fadal 1090‑2 is a keyboard‑interface PCB used in older Fadal VMC/MP CNC machines; it receives key, MPG, stop, block‑skip, rapid travel, resolution, axis selection, emergency‑stop, keylock, slide‑hold and start signals and forwards them to the Mill Interface (1040) board. Known failure points include damaged surface‑mount ICs or decoupling capacitors, cracked solder joints on the keyboard connector, and degraded power‑rail traces that can cause loss of video output or “garbage screen” symptoms. First‑check diagnostics: verify 24 V DC input to the board, inspect all connectors for corrosion or loose pins, test the key‑scan ICs with a logic analyzer, and review any stored error codes from the CNC controller.[oss-gpt-20b]