I comprehend that Switch is no longer powering on and you have perfrom every thing mentioned in the thread.
For Lennar accounts we have a separate page where you can always feel free to reach us and post your queries.
Please note each post on a Lennar support page is a case for the Lennar Support team when posted. They will look into the issue you are facing and will help you with resolving the issue you are facing.
Please post and communicate only on the below link which is in Lennar community page to help you with your issue.