Okay so I have a lenovo k-450 which has a 280w power supply and and i5 4430...I just installed a gtx 750 ti ftw...I turn my pc on and everything looks good..fan is running on the 750 but nothing shows up on my monitor, a hdmi monitor, I don't have any plugs from my power supply plugged into the gtx because there isn't Any to plug in and I think that's how lenovo is..but if someone could help I would really appreciate it..and is there any possibility the card is messed up?