Fanuc Starting System Software Please Wait

Power cycle again. If the control boots, one of those devices was causing a boot conflict. Re-introduce them one by one to find the culprit.

Physical hardware failure is less common but does occur. Electrolytic capacitors on older FANUC 16/18/21 series main boards (circa 1995–2005) degrade over time, causing unstable voltage rails. Also, the "Master PCB" or "Main CPU Board" (e.g., A16B-3200-xxxx) can develop cracked solder joints on the DRAM chips. fanuc starting system software please wait

When you power on a FANUC CNC, the control does not boot like a standard PC. It follows a strict, multi-stage hardware and software initialization sequence. Power cycle again

The "Please Wait" screen appears immediately after the initial BIOS/Power-On Self Test (POST) and before the full CNC or Manual Guide i interface loads. Physical hardware failure is less common but does occur