Turned a robot on yesterday after having it shut off for a few months. Showed a bunch of fssb errors, cycled power and they went away and now the fault signal is red on the TP, robot won't move and at the top of the screen it says Please power off if you want to recover. Looked at a number of threads already and here is what i have tried.
Replaced the three fuses on the axis control board
replaced axis control board
replaced fiber optic cable
connected to a different teach pendant
Nothing helps. When examining the fiber optic cable i noticed I am getting a light from servo amp for the fiber optic cable but no light returning from axis control board. Checked the cable on a functioning machine and can see light from both sides so the cable is good, just no light coming out of axis control board it seems.
No LEDs are on on the axis control board either