Leaks from outside the dishwasher
Leaks coming from outside the dishwasher will be relatively easy to locate and are either at the connection of a hose with something else or in the hoses themselves. If it is in the joint of the hose, many times the problem can be fixed by replacing the rubber gasket and fastening the joint a little more securely.
Be careful if the leaking joint is located at the inlet valve, as most inlet valves are made of softer plastics and can easily be cross-threaded and stripped. Leaks in hoses are usually addressed by replacing the hose, though on certain occasions a patch may be effective.