Look at the Main CPU board (usually behind the LCD screen or in the electrical cabinet for larger controls).
: Ideally, the top two should blink and the bottom two should be solid once fully running. Try a Boot Monitor (BMON) Start Turn off the power. Press and hold the keys on the Teach Pendant. fanuc starting system software please wait
Once you have restored your machine, follow these three golden rules to never see the "Please Wait" loop again: Look at the Main CPU board (usually behind