Life was beautiful, with my 6570 Radeon card displaying on an NEC monitor (through DVI) and a Samsung LCD (HDMI), until the recent heat wave, when the card basically melted. So I've now purchased four graphics cards. The first three didn't work out for various reasons. But I finally got one to function with my non-UEFI motherboard and 300w power supply. It's an HP-branded 6570. Works fine on the DVI output. But the other outputs are both Displayport! So I bought a Displayport to HDMI adapter on Amazon. Plugged it in. TV doesn't find signal. AMD Catalyst doesn't find TV.
HELP! This nonsense has been going on for two and a half weeks now.
Probably a faulty card or faulty adapter one or both would need to be replaced, I assume you have tried both displayport ports?
If it were me I would get a better PSU and a GPU which has a HDMI port.