Thanks for reaching out and I'm sorry to hear about that. Let's sort this out.
A few questions: what's the LED status on your Living Room Chromecast? What type of Chromecast device do you have? Do you have a dual band router?
Give these steps a try:
Let me know how it goes.
Just one quick final check in here since activity has slowed down. We haven't heard from you in a while so we'll be locking this thread if there is no update after 24 hours. If you have any new questions, updates or just a discussion topic, feel free to start a new thread in the Community.