LG LD-4050W dishwasher shows an E 1 fault, but no leaks found, and soloniod checks out ok?

When no leaks are found and you are getting an E1 error, the most common reason is that two things are true.

1.) The dishwasher drain hose does not connect to an airgap valve before it connect to the garbage disposal (or drain connection)

2.) That same drain hose does not have a high point in the hose between the dishwasher and the drain. This allows a natural siphon effect to pull the water out of the DW during the wash and rinse cycle.

The best solution is to install a dishwasher air gap on your sink and connect the drain hose to it and the air gap to the actual drain. They are almost free and any real hardware store.

But if the air gap is not possible, lift the drain hose as high as possible under the counter top and attach it so it stays up there.

Please report back with what you find. OK?