Sony LH10 is a Sony Magnescale digital readout (DRO) unit used on CNC lathes and milling machines for axis position display. Common failure modes reported include loss of signal after long storage, intermittent power-up glitches, and erratic or blank displays; these are often due to degraded power supply conditioning, loose connector contacts, or internal board component fatigue. For troubleshooting, first verify the 12 V DC input voltage and ensure the unit is receiving clean power; next inspect all cable connections for corrosion or looseness, especially the scale‑to‑DRO interface; finally check the display’s internal fuse and look for obvious signs of overheating or burnt components on the PCB.[oss-gpt-20b]