Just purchased the ENVY Phoenix 810-160 w/NVIDIA GeForce GT 640 graphics card, about 2 weeks ago. I also purchased 2 HP Pavilion 23xi monitors for a dual setup. Using the DVI cables for both monitors, the second monitor does not display anything. Have power to it, scans for the connection, but goes to sleep after not finding the hookup. What am I doing wrong?
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