Jayisanoob :
The pc is running but doesn't output anything with or without the card
By running you mean it turns on? Just because it turns on does not mean the motherboard is OK. The fact that your keyboard does not even light up and the fact that you have no display points to a bad motherboard if you reset the BIOS. The system may still give power to the motherboard, and the hard-drive may even make sounds, but with no display and no keyboard/mouse use, you can'd do anything.
Try reseating the RAM, reset the BIOS by removing the CMOS battery for about 10 seconds with the system unplugged, and test things with the onboard video again.