I have a Dell Studio XPS 435t Desktop and a Dell Inspiron 560 sharing a Dell 23 ST2310 flat panel monitor via an IOGEAR two port KVM switch. I have a Samsung 7100 HDTV that I connected to the Studio XPS video card's HDMI port and It worked beautifully, better than I expected. However the Dell monitor went completely black except for the cursor which lights up when I move the mouse. According to the specs, the Radeon 4350 video card in the XPS is able to drive two displays simultaneously. Is the KVM switch causing this problem, and if so, is there an affordable workaround?