Depending on the motherboard, it may still put the video out the onboard video connection until you tell it different. Hook it back up to the first video port to see if it is still on. You can usually run both outputs but not always (just until you get everything set up). Some motherboards will need you to shut off onboard video in the BIOS. Do that afterwards if necessary.
I have a HP intel pentium 4,
1 gb memory
200gb hard drive
ati radeon xpress 200 (intergrated video card)
So I got a new video card a Radeon xpress 800xl 256mb PCI-E. I went to device manager and uninstalled my intergrated one. Then turned off the computer, installed the new card and connected the blue cord, the one that connects to the monitor (sorry don't know what it's called) to the new grapgics card slot. Then turned on the computer and nothing happens, no start up. Just "No signal" showing.
Did I miss a step?. Was I supposed to disable the intergrated one first, rather than unistall? Have any solutions? Thank you for your help.