Most helpful are all the videos on this website that allowed me to watch, learn, and have the courage to remove, clean, and reinstall the spray arms, the filter basket, and all accessible interior parts. I ran the dishwasher for a test run after cleaning; the loud noise was no longer present, and I observed that the dishwasher was no longer draining.
Used a shop vac to remove the water; watched more repair videos; and ordered the Drain Pump and a Check Valve Flapper. The diagnostic review for "making loud noise and not draining" pointed to a failed drain pump.
A friend helped with the drain pump removal and installation, as I was not comfortable disconnecting the electricity and the water supply hose. The drain pump assembly was replaced; we did not need a separate flapper valve, as that was already within the drain pump assembly. The dishwasher works beautifully once again!
A decibel meter identified the noise level after repair of around 52 db in our trial run. No leaks; perfect draining!
This is not the first time we have ordered parts from AppliancePartsPro.com, as we have repaired our refrigerator, washing machine, and clothes dryer. With older machines, I feel more at ease tackling the repairs and am especially comfortable with the repair videos and service offered by Appliance Parts Pros. Thank you for offering such in-depth service. Grateful, we are, Happy Customers in the mountains of Virginia