If the hardware is healthy, the system software or SRAM data may be corrupted, often due to a dead backup battery or an improper shutdown during a write cycle. Facebook·FANUC Robot Programmers
If you have reseated the boards, cleared the SRAM, verified the voltages, and the controller still hangs indefinitely on "Starting System Software Please Wait," you are likely dealing with a catastrophic component failure.
Before opening a service ticket or diving into complex diagnostics, perform these basic but critical checks. Many "hangs" are caused by simple, overlooked issues. fanuc starting system software please wait
Did this happen after a ? Do you have a recent backup of the machine parameters?
: Unstable power supplies or damaged power cables can lead to control board malfunctions. Recommended Action Path If the hardware is healthy, the system software
How to Fix the FANUC “Starting System Software Please Wait” Stuck Screen
Hold S and P keys (on some models) during power up to enter the boot loader menu. 4. Replace Back-Up Batteries Many "hangs" are caused by simple, overlooked issues
If the "starting system software" message persists after a cold start, or if you receive a message, you likely have a hardware failure on the mainboard or corrupted BIOS. In these cases, you will need to contact Fanuc support or a specialized CNC repair technician.
Store the backup on three different media (network drive, USB, paper printout).