Replace the lithium battery inside the CNC unit (usually a black or yellow FANUC battery pack). Note that if the memory is already lost, you will need to reload your original backup files via the Boot System menu. 4. Faulty Power Supply Unit (PSU)
Before opening any electrical cabinets, eliminate simple external triggers. Turn off the main breaker of the machine tool.
When the system hangs indefinitely on the "Please Wait" screen, the bootloader sequence has been interrupted. The processor is waiting for a response or a file transfer that is not happening. Common Causes of the Boot Hang
Always ensure the robot is in a safe position before attempting recovery, as system resets can lose "Mastering" data, causing the robot to lose its sense of physical position. fanuc starting system software please wait
Install a line filter and a UPS (Uninterruptible Power Supply) for the CNC’s 200VAC input. Brownouts are a leading cause of flash corruption. The FANUC power supply module (PSU) should output a steady 24VDC ±5%.
Your FANUC CNC is a marvel of deterministic real-time control. When it hangs on that ominous white screen, remember: it is not angry at you. It is simply waiting for something it needs. Now you know exactly how to give it what it needs—or how to diagnose why it cannot get it.
While the steps above provide a path to recovery, it's far better to avoid the "Please wait..." stall from happening at all. The key is a proactive preventive maintenance program, which involves: Replace the lithium battery inside the CNC unit
To minimize the risk of unbootable control systems, implement the following maintenance routine:
Replace CNC back-up batteries on a strict annual schedule.
Fanuc Starting System Software Please Wait: Causes and Solutions Faulty Power Supply Unit (PSU) Before opening any
Troubleshooting the FANUC "Starting System Software Please Wait" Boot Loop
: May indicate a need to replace the Teach Pendant (TP) cable or the mainboard itself. Verify Main Board LEDs