Please Wait — Fanuc Starting System Software

or R-J series) attempts to load its operating system from memory during power-up

If the SRAM battery backup is low (common on older 0i-A/B/C models) or the SRAM chips have failing cells, the checksum fails. The CNC attempts to automatically format or repair the SRAM area—but sometimes gets stuck in an infinite repair loop, showing "Please Wait." fanuc starting system software please wait

The controller has run out of memory, often seen when using vision systems. Step-by-Step Troubleshooting Guide 1. Initial Checks or R-J series) attempts to load its operating

To understand the error, you must first understand the FANUC boot hierarchy. FANUC CNC controls (Series 0i, 15, 16, 18, 21, 30i, 31i, 35i) are specialized industrial computers running a real-time operating system (OS). When you power on the control, it undergoes a specific, layered boot process: Initial Checks To understand the error, you must

Be prepared to provide the FANUC control model (e.g., Series 31i Model B) and the main board part number (located on a white sticker). Most professional repairs for a frozen boot issue range from $1,500 for a battery/parameter restoration to $8,000+ for board replacement.