Verify that the water inlet valves are both fully open. Most valves turn counterclockwise to open. Tighten the water inlet hose connections if they are loose.
Shut the washer door firmly and select a new wash cycle with rinse option. Make sure the load size is not too large, as the washer may not be able to rinse clothes effectively if too many items are in the tub.
Straighten out the water line hoses after cleaning the inlet screens to prevent blockages from affecting water supply and flow.
Use a water pressure gauge, available for purchase at most hardware stores, to check the household water pressure, which should be at least 120 PSI (pounds per square inch).
Contact LG for assistance if the above methods do not resolve the issue.