Fanuc Starting System Software Please Wait [updated] «2026 Update»
If clearing the SRAM does not change the "Please Wait" screen, hardware modules may have poor electrical contact due to machine vibrations. Shut off all electrical power to the machine.
FANUC power supplies are resilient, but a 24VDC supply that is dropping to 19V or spiking to 30V due to a failing PSU can cause the CPU to reset mid-boot. The message appears, then the watchdog timer resets the CNC, looping endlessly.
A faulty Teach Pendant (TP) cable is a common culprit. If possible, swap it with a known working cable. fanuc starting system software please wait
How to Fix the FANUC “Starting System Software Please Wait” Stuck Screen
For a 0i-D or 31i-B with corrupt system software, you will need: If clearing the SRAM does not change the
: If the system displays any error codes alongside or after the "Please Wait" message, note them down. These codes can provide specific clues about what is going wrong.
A short circuit in the 24VDC power supply line, a faulty I/O Link module, or a damaged connection to the operator's panel can pull down the main bus voltage and freeze the processor. The message appears, then the watchdog timer resets
When a FANUC robot teach pendant gets stuck on the screen, it indicates that the controller is failing to complete the startup sequence, often stalling between the initial hardware boot and the software loading phase. This issue is commonly related to corrupted software, memory faults, or hardware failures in the controller cabinet.
Warning: Only do this with the power completely off. Dust and vibration can loosen the DIMM modules or the yellow plastic-cased modules on the main board. Gently reseating these, as well as the fiber optic (FSSB) cables, can often resolve "Please Wait" hangs caused by poor connectivity. When to Call a Technician
: Open the controller door while powered on and check the red 7-segment display on the main CPU board.
Make it a strict policy to back up your SRAM data to a dedicated CompactFlash card or network drive every six months, and always before making any parameter changes.
