: If you are using a robotic controller (R-30iA/B), a faulty teach pendant or a frayed cable can prevent the system from completing its boot sequence. Try swapping with a known working pendant if available.
If a simple restart doesn't work, the problem often lies in a physical connection that isn't reporting back to the main CPU. fanuc starting system software please wait
: A "lazy" power supply that takes too long to reach full voltage can cause a "race condition," leaving the software waiting for a signal that arrived too late. Check if your 24VDC supplies are consistent. 3. Software Corruption & Boot Monitor (BMON) : If you are using a robotic controller
to allow the capacitors to drain completely. fanuc starting system software please wait