The graphics card on this system, the AMD Radeon R7 350 graphics card, can only handle one monitor at a time. This is the HDMI-out port. The VGA adapter is directly connected to the processor and the graphics processing integrated within the AMD FX processor. When the VGA port is in use, the HDMI port will not work. If you unplug the VGA monitor, I believe you will see that the HDMI port will now work.
8 years, 3 months ago
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