I have a 4 monitor setup with an Nvidia GTX 680, an Nvidia Geforce 120, and a USB3 to DVI adapter. 3 monitors and one HD TV going from DVI to HDMI.
For some reason, currently I can't get Mercury Transmit to refresh and display on the monitors I'm selecting. Whether I toggle it on and off, switch the displays or whatever, it won't update and display.
I should mention that this setup has been working fine in the past with this very same version of After Effects, so there is nothing wrong with the hardware configuration.
I'm sure it's probably just going to randomly start working at some point like it seems to do, but I was wondering if there is more specific way to go in and refresh it so that it will update and display?