I viewed the self help video on You Tube and checked the water pressure first. Once the water pressure was determined to be fine I ordered a new water inlet valve as recommended from the video.
LG supplier did not have the recommended part and after checking on-line I found Appliance Parts Pros had just what I needed.
The video from Appliance Plus Pros showed step by step on how to replace the water inlet valve. It took me approximately 15 minutes to remove the old one and install the new one. Only two tools were necessary (wrench and screw driver).