|I had a similar experience when I had a monitor plugged into a HD AIW card in a PCI-E X16 slot on an Asus M3A78 Pro mboard, which has onboard ATI video. The onboard video is was not disabled automatically when I installed the AIW card in the PCI-E X16 slot. I found when the card was installed and I pugged the monitor into the onboard video port I had video. |
Go into the bios Setup and set Intialize Display First, or Primary Display, or similar, to PCI-E slot, or similar, rather than onboard video, or similar.
E.g. for the Asus M3A78 Pro mboard, that's in Onboard Devices Configuration - Primary Display Adapter
choices are onboard, PCI, and PCI-E
I have no idea what this blue cord is you're talking about.
If it's a cable for Crossfire support, it's supposed to be connected between two connectors on two cards in slots, only. The card often comes with it, or the mboard may have come with it. .
The 4850 card MUST have an additional power connector from the power supply connected to it.
The 4850 probably has two monitor ports. If so, one is Primary, the other is Secondary. Sometimes when you connect a single monitor to the Seconadry port, you get no video. Try connecting the monitor to the other port if you get no video.
If your mboard has two PCI-E X16 slots, a single card must be plugged into the Primary one, the one closest to the center of the mboard.
When you change which port you connect the monitor to, always do that when the computer is not running.