Oh well, it didn't work. The HDMI-to-DVI cable worked fine for games. But for some reason, when I tried to play a BD disc or DVD, the screen went light pink. Oh well, I just put everything back. Of course that was a total pain in the ***. Every time I put the S77 back in the cabinet, the HDMI cable would come disconnected!
Then I had to reprogram my Harmony. Guess I should have left well enough alone.