again, no worries about the model. we can try to figure this out with out it.
first flip the breaker off to the machine or unplug it. then remove the lower kick plate under the door by removing the two or four screws to the kick plate. then with the kick plate off you will notice a small metal box. usually on the right hand side of the machine. and there will be one screw holding the front cover of that box on. remove the screw and then remove the front cover of the box and you will see the wires.
Make sure that the wires are not damaged or burnt in any way. along with the wire nuts that attach to the end of the wires. if the wires are damaged repair them and reconnect. if no damage, unscrew and fully disconnect the wires and reset back in place. making sure the wire nuts are fully on the wires.
then power on the machine again and see if the control board will light up and work. if it does, great. let it run a few times and see if it will run though a few cycles.
if after refitting the wires and powering back on the machine doesnt come on or light up at all then you will need to replace the main computer board.
and just to let you know, some of the dishwashers similar to yours have fuses in them that will kill all function to the machine. so we may want to check that as well. most of them are in the top of the door.
to check the fuse you will need to remove the top six or so screws from the inner door frame. then remove the top console of the door. then remove the control cover. and behind the cover you will see the control board and the fuse on the board. the fuse will either be round or squarish in shape and will have two wires running to it.
with power off remove the wires to the fuse and fit the wires together. this will jump out the fuse. make sure the wires are only touching metal to metal and nothing else. then power the machine back on and seeif you have lights to your machine. and if you do then good news, you most likely only need your fuse replaced. bad news is that you will have to remove it and take it to an appliance
parts store so they can match it to the one you need. since you don't have a model number i cant tell you what the fuse part numbers is.
if the jumping of the fuse does nothing then you will have to replace the control board.
run those checks and get back to me here if you need more help. let me know what you find.