I have an early 2008 mac pro tower with an ATI Radeon HD 4870 512 MB Graphics card, a Kona LHi card, and a 27-inch Apple LED Cinema display for my monitor.
I have a TV mounted to my wall for client purposes, and I've had no issues with playback from one to the other.
Recently, I switched out the Apple monitor with a Dell Ultrasharp U3415W, and connected it to my tower. It connects to the tower no problem. However, Premiere no longer recognizes my Kona Card.
This seemed like not a big deal with the Apple monitor, but now it won't recognize this new monitor, and even further more, I'm not sure why it's causing an issue with the other two (Tower and TV) that were connected independently of my monitor.
I'm not tech illiterate, but this world is still fairly uncharted for me.