I can't use the HP pen on my xp spectre x360 2015, anyone knows why?

[TN8]

I bought a Hp pen for taking notes on my spectre x360 I bought in 2016 and, for apparently no reason, the pen doesn't even turn on when I tap on the screen as the instruction manual says.  Can anyone help me? 

[Dragon-Fur]

@TN8 

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[ClintC]

I too have this problem/situation.  I purchased a brand new Spectre computer which came with a pen(M23855-001)  so one would assume that it is supposed to work with the computer???  I could not find any instructions with the product and I can't get it to do anything.  So far I can't even figure out what the two buttons on it do?  Does it need charging in some way to work?  It simply came with a supply of extra tips... NOTHING ELSE!