Why isn't my NAS visible on my network?

Episode 1529 (2:07:53)

Paul from Lake Forest, CA
Western Digital NAS

Paul's WD NAS can't be seen on his network after changing the cable connector. There's a red light that says "I'm not working." Leo says he could try to use another computer with the dashboard software and connect directly, bypassing the router. If he sees it, then there's some issue connecting through the router. Leo says that Western Digital's NAS is terrible. Definitely not his preferred NAS. They fail more often than others. Leo prefers Synology.