X carve stopted working

Good day, please can I ask for urgent assistance. My xcarve has just stopted working. I am running my gcode through UGS and it has been working fine for years. All of a sudden, in the middle of a job it just stopped. Cant get it to react to anything. What might be the problem? I have checked all wires, the controller is on with green light at the back but the power light on the front has gone out. Please assist. Im at my ropes end. By the way, complete novice, tried reading up on the treads but dont understand any of the things being said about reflashing and so forth.