Ardis, I know there are people on here that have been on Mariner since I was on in February. But, in Feb. Mariner had not had the TVs installed yet. Just checked and below is copy and pasted from our trip journal of Jan. 12.
We asked the Hotel Director Richard Fenn about the status of the new TV systems since our TVs and reception/broadcast quality is so poor and unreliable. He said that it was scheduled for March 4 to 24, 2008. He said that he had scheduled a crew to come onboard to do it in Ft. Lauderdale and he was having half of the flat screen TVs and interactive equipment delivered on the 4th and the crew would stay on for the full 20 days. He would have the remainder of the TVs and equipment delivered on the return to Port Everglades on the 14th. So, he expected it all to be done during 2 10-day Caribbean cruises in March, after we depart.

Hopefully, you will get a reply from someone who has been on since March and can give you a more current and positive answer.
Debbie