I seriously suggest that you stop poking around where-ever you like especially around the Mains plug and sockets , death can be Quick and sometimes it might take some time .
In the evaluations you made , did it not seem strange that written on the Fan is DC24V and a warning pop up and wonder why there was 110V and not only that but written DC , so why is the multi-meter on AC .
Keep going with this style and we will be reading about you in the Newspaper on watching about you on the TV , "Newbie Dies with only 3 Posts"