Fanuc Starting System Software Please Wait ~repack~ -

Fixing the "FANUC Starting System Software Please Wait" Blank Screen Error

Swapping the CPU or Main Board if the software continues to hang after an INIT start. Hardware cost and configuration required.

FANUC stores system software on a memory module (often called the "FROM" or Flash ROM). If a critical sector becomes corrupted due to a sudden power loss during a previous write operation, the boot loop hangs. This is especially common if the machine was powered off while a parameter write or a macro compilation was in progress. fanuc starting system software please wait

If you cannot access the Boot System screen or if clearing the memory yields no results, the physical FROM/SRAM module or the main CPU card has failed and must be sent to a certified facility for component-level repair or replacement.

This usually requires a System Reload .

on the Teach Pendant while powering back up to enter the Boot Monitor menu. INIT Start . Note: This may require reloading a backup. Hardware and Software Recovery

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. Fixing the "FANUC Starting System Software Please Wait"

Understanding why this freeze happens and knowing how to systematically troubleshoot it can save you thousands of dollars in unnecessary board replacements and technician fees.