Graphics Card Issues with Lenovo M81 SFF - AMD 6450 doesn't work

[wallock]

The title pretty much says it all. I am attempting to install an AMD 6450. I turn on the computer and get no video output. It's clear it's not not loading Windows behind the scenes because the power will turn off with a quick push of the power button (as opposed to holding it down). I've already flashed the bios to make sure it's up to date. Any idea how to get the card to work?

[BiggAl]

Odd, I used an Amd 6670 in a M91p (same generation as your M81.)   Generally back then, if one 6xxx card worked, other models would also. 

Does the system beep when you turn it on?   Is the 6450 known good, or can you test in a different system?