Re: Computer can't detect second monitor
I have two ports on my card, and I can plug into ether one with no problems, thou I have Nvidia. ATI may have to be enabled, I'm not sure.
Go into your ATI display properties and see if you can find something for multiple monitors. (You've probably done this already)
If there is going to be a way to turn a port off or on, it should be in there.
Other than that, it's possible there is something wrong.
Asus M4A88T-M/USB3<>PhenomII X4 965e<>Asus ENGTX460
Seagate 320GB/1TB<>Win7 Ulti 64Bit<>Antec900
SyncMaster 2220WM<>HyperX 16gb<>Cooler Master 600W