Open the electrical cabinet and locate the main FANUC command unit. Look at the status LEDs on the master PCB.
Inspect the motherboard for physical signs of damage, such as bulging capacitors or burn marks. If the CPU board is defective, it will require professional repair or component-level replacement. 3. Dead Memory Backup Battery
If you have cleared the SRAM, verified the modules are seated, and the control still hangs on the "Starting System Software" screen, a physical component has likely failed.
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.
Internal components within the FANUC PSU degrade over time, leading to electrical "noise" or ripple currents.
FANUC controls rely on a lithium battery to maintain the SRAM (which holds your parameters, programs, and tool offsets) while the power is off. If this battery dies and the machine stays off for an extended period, the SRAM can scramble. Upon reboot, the system struggles to reconcile the corrupted data, causing a hang. 3. Faulty Hardware (Mainboard or Modules)
Fanuc Starting System Software Please Wait ((exclusive)) Jun 2026
Open the electrical cabinet and locate the main FANUC command unit. Look at the status LEDs on the master PCB.
Inspect the motherboard for physical signs of damage, such as bulging capacitors or burn marks. If the CPU board is defective, it will require professional repair or component-level replacement. 3. Dead Memory Backup Battery fanuc starting system software please wait
If you have cleared the SRAM, verified the modules are seated, and the control still hangs on the "Starting System Software" screen, a physical component has likely failed. Open the electrical cabinet and locate the main
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. If the CPU board is defective, it will
Internal components within the FANUC PSU degrade over time, leading to electrical "noise" or ripple currents.
FANUC controls rely on a lithium battery to maintain the SRAM (which holds your parameters, programs, and tool offsets) while the power is off. If this battery dies and the machine stays off for an extended period, the SRAM can scramble. Upon reboot, the system struggles to reconcile the corrupted data, causing a hang. 3. Faulty Hardware (Mainboard or Modules)