Nvidia GTX 560 Ti not being picked up by monitor

[CloudBeak]

So, I got a box of parts from my uncle, including both an Nvidia GTX 260 and a Nvidia GTX 560 Ti. The 560 didn't work and so we put in the 260. About a year later, (Today) we went to the computer shop and tried to install the 560. Still didn't work. I haven't given up hope yet.

THE PROBLEM:
The card is not being detected by the monitor. The monitor says "No Signal"
Everything is plugged in right.

WHAT I'VE TRIED
Installing drivers for the 560. Nvidia won't let me install them because I don't have the card in my computer.

MY SPECS:

PSU
Antec TruePower New TP‑750 Blue Power Supply ‑ 750W
Brand: Antec
Form factor: ATX, EPS
Wattage: 750 watt output
80 plus rating: 80 PLUS Bronze
Feature: Modular

NOTES:
The fan on the card still spins when turned on.
I Can't install the drivers because I can't get to the site with the card in.
I Don't have the driver install disc. (Got the stuff from my uncle.)

Thank you! I Hope you can help!

 

[bignastyid]

"The 560 didn't work and so we put in the 260. About a year later, (Today) we went to the computer shop and tried to install the 560. Still didn't work." if itsd not working on 2 different systems it's a bad card. This is not a problem drivers can fix. If it was just a driver issue you would get the post screen(s) and boot and wouldn't fail till the OS loads the driver.

 

[CloudBeak]

"The 560 didn't work and so we put in the 260. About a year later, (Today) we went to the computer shop and tried to install the 560. Still didn't work." if itsd not working on 2 different systems it's a bad card. This is not a problem drivers can fix. If it was just a driver issue you would get the post screen(s) and boot and wouldn't fail till the OS loads the driver.

Sorry for not clarifying, The rig hasn't been changed since it was built. The card just hasn't worked at all on this rig.

 

[bignastyid]

"The 560 didn't work and so we put in the 260. About a year later, (Today) we went to the computer shop and tried to install the 560. Still didn't work." if itsd not working on 2 different systems it's a bad card. This is not a problem drivers can fix. If it was just a driver issue you would get the post screen(s) and boot and wouldn't fail till the OS loads the driver.

Sorry for not clarifying, The rig hasn't been changed since it was built. The card just hasn't worked at all on this rig.

Can you try it in another system?

 

[CloudBeak]

"The 560 didn't work and so we put in the 260. About a year later, (Today) we went to the computer shop and tried to install the 560. Still didn't work." if itsd not working on 2 different systems it's a bad card. This is not a problem drivers can fix. If it was just a driver issue you would get the post screen(s) and boot and wouldn't fail till the OS loads the driver.

Sorry for not clarifying, The rig hasn't been changed since it was built. The card just hasn't worked at all on this rig.

Can you try it in another system?

Not really no. My PC is the only one in our house.