Please give a list of parts motherboard brand and model video card(s) brand and model Do you have a pci-e sli motherboard but only have one card so far? (which slot did you put the one in). Does the video card have a power connector? Some more information can only help, and would not have hurt you in the least if you had included in your first post. When asking for help, too much information can't hurt, not enough and you will get nowhere.
Why in the world would you boot the pc first and then turn on the monitor? thats what your post says!
ok i have the monitor on but after nothing happens i turn off then on then it says no imput but anyways i have asrock 775 dual-vsta motherboard and a radion pci express-16x video card and my motherboard does have a pci ecpress slot witch i plugged it into and i have an intel p4 prosseor and a 512 memory stick and a 320 gig hard drive and a cd/dvd combo drive and a floppy drive and when i power up it makes all the same sounds all my other comps make when they turn on i think its the video card and when my friend gets off work hes bringing his agp video card and yes my motherboard can support it and im going to put it in and see if i can get video and i have a 17in gateway flat pannel monitor and im not using lcd connection im using standerd right now untill i can buy a cable for it