second monitor connection

[ngpatel]

I want to connect my hp all in one desktop to another monitor with hdmi cable  but its not connecting if you can help me with that plese

[itsmyname]

@ngpatel -- if you hold-down the "Windows" key (bottom left of your keyboard) and tap once on the "P" key, does it show that you have both 1 "internal" and 1 "external" monitor?

[ngpatel]

it is showing pc screen only

bottom of it duplicate second and extend

[itsmyname]

@ngpatel --  it is showing pc screen only; bottom of it duplicate second and extend

OK. What happens when you click "duplicate" ?