The card has four DisplayPort outputs, and we've been using two of them with DP -> DVI adapters to connect to the DVI ports on 27" Acer monitors. I recently purchased this DP -> HDMI adapter (4K UHD support model) and am using it with a 25' HDMI cable to our HDTV... no signal. In the NVIDIA Control Panel it says there is no connection, even after attempting to detect additional displays with TV detection on. I have downloaded the latest drivers for the Quadro M4000 as well. Any ideas? Perhaps I should check for new updates via Windows Update?