I have a 2003 case 95xt that will not move. While operating in the yard everything stopped moving there was no signs of a bad pump or warning lights. When i start it back up i have no green safety warning lights usually there a three green lights and the hydro low pressure warning light is on now.
Could and most be a likely a sensor, there are several of them, the seat, the cab sensor that detects if the cab is up and the door if equipped. However if your low pressure light is on it could be more serious. Perhaps change hyd. filter, of course check levels and pull up cab and check for leaks in the bath tube. That machine can hold an aweful lot of fluid in the tub before it comes out on the ground. Hopefully it is something easy.
Check the basics first, fuses, relays, and oil levels. If that checks out all good, then remove the interlock relay and jump pin 30 and 87 together, and see if it moves. If it moves then you have a bad safety switch, like the cab switch or lap bar or seat switch. If it doesn't move, then you may have a bad pump coupler.