I have a Radeon Hd 7770 with two monitors connected to hdmi and displayport outputs, and I'm trying to add a 3rd with a DVI to VGA then a VGA to HDMI into the 3rd monitor (It's actually a television). In total, that's going DVI --> VGA --> HDMI. But, it is just not showing up at all, not even as a generic PnP. No signal on the telly, nor on the control panel. nada. Any ideas?