Im so stupid sometimes.. Im having an old ati radeon hd 5450 graphic card where this is the only one i bought in a local store which fits into my mother board.. Im totally a noob in all these hardware stuffs... I tried inserting the graphic card into the PCI-E ×16 slot.. It used to work before i dono why it isnt working now.. So i tried to insert a tester screw driver into the slot so that to know whether the electricity is passing or not.. And after that i put that into another small slot which looks similar to pci-e slot but smaller (about half the pci-e slot) and then a spark happened.. Since then.. There is no display.. But the fan is running. Please help me out!