Computer powers, but no video signal or POST

Computer powers, but no video signal or POST the build is about 3 years old and has had no recent changes to it.

Turning on power, all fans and motherboard LEDs turn on, but neither of my monitors gets any video signal and I do not hear a beep to indicate that the POST test has passed.

Here is what I have done so far:

reseated the graphics card
reseated the RAM modules

attempting boot without the graphics installed gets me a long beep followed by 2 short beeps (indicating no video path was found)

I have verified that my RAM is not at fault as without it the POST returns several long beeps as expected.

I have also verified my PSU both unloaded and under its full load and all pins return their expected voltage under both conditions.

I am thinking that this indicates that my graphics card has gone bad (it will power on and its fan does start up)

can anyone confirm this based on what i have done so far?
Any input or further suggestions would be very helpful

Thanks