I understand you're looking for information on connecting a secondary display to your ENVY 23-c110tx All-in-One PC. According to the specifications for the motherboard used in this model there are no video output ports. There are third party companies who manufacture USB adapters that can convert a USB port to DVI, HDMI, or VGA, but this is not something HP specializes in so I can't offer any information other than letting you know they exist and might be worth looking into.
Hopefully this helps get you in the right direction. 🙂
Great-Deku-Tree I work on behalf of HP
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