As far as my search on the www goes, I can't seem to locate any display output port on your
HP Pavilion 23, provided I'm looking at the right one off a Google Image search...and as such I'm going to suggest that you work with a SB driven display adapter since your unit doesn't have any physical means to connect to a secondary/external display.
If you could please pass on a SKU of the unit in question, you'd be able to get a more definitive answer. It'd help us two fold if you could also link us to the adapter you've purchased but had failed to work.
Moved thread to system's since this isn't a laptop.
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Lutfij