POST = power on self test, it's the text that says info about computer hardware, like CPU, memory, etc.
Anyway, if you can see BIOS, the card isn't dead. Did you try reinstalling windows? Are you hooking the monitor up to the graphics card or the motherboard?
I see the MOBO options (DEL, F10 etc) on boot up every time but not the other stuff. I tried connecting to the HDMI & DVI to VGA on the 7750 and both had no signal.