Look at the back of the top cover. Remove the screws from the panel and push back on the panel. It will be snug but it will slide back. Once it slides back, lift it off and set it aside. You should be able to locate the leak. I would venture to say a water valve has failed but a visual inspection will confirm the problem. You may have to let a little water flow into the machine in order to locate the leak. Let me know what you find.