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.
: If the issue persists and you've checked all the basic troubleshooting steps, it might be best to contact FANUC support or a certified technician. They can provide specific guidance based on your system model and configuration. fanuc starting system software please wait
If you are still experiencing issues, please share which (e.g., 0i-MD, 31i, R-30iB) you are using and I can provide a more tailored diagnostic approach. Physical hardware failure is less common but does occur
To fix the problem, it helps to understand the FANUC boot sequence. When you flip the power switch on a FANUC 16i/18i/21i, 0i-MC/MD/MF, or 31i series control, the hardware undergoes a basic power-on self-test (POST). : If the issue persists and you've checked
If you reach the IPL menu, good news—your system software is intact. The problem is likely corrupted SRAM data. (that wipes all parameters). First, try option 3: CLEAR FILE. This deletes only part programs and offsets but leaves CNC parameters. Exit IPL (option 1) and reboot.