So even if KVM still works, the EM interference from 8940 quickly jams the HDMI transmission through the double length HDMI cable, even though each cable by itself works fine connecting 8940 to monitor. Even without the KVM factor you are basically running a double length HDMI cable from 8940 to monitor. ![]() Using the IOGEAR Wireless Software - Windows This section provides information on using the following software to manage the IOGEAR Wireless Software to adjust settings to suit your needs: 1. HDMI cable is also notorious of being susceptible to extrinsic EM signal interference, particularly with too long cable. System Tray Notification Area, you can access the UWB Connection Manager by double click-ing the UWB Connection Manager icon on your Windows desktop. The desktop has much more power than the laptop. That explains why KVM was still able to relay HDMI signal from pc to Dell monitor at the beginning few seconds after 8940 is powered up, but then quickly got cut off or blacked out by the 8940, which acts like an unwitting jamming device. ![]() Since your Inspiron laptop connected to KVM using same HDMI #1 and 2 cables work, but as soon as you switched the video source from laptop to XPS8940 desktop, you got temporary video (Dell logo, Windows logo) followed by black screen, it seems the most straightforward working diagnosis is this:Ĩ940 desktop after it is powered up near the KVM emits EM interference signal that disrupts KVM operation.
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