laptop cannot open

Hi @su_72,
 
Welcome to the HP Forums 🙂 
I would like to take a moment and thank you for using this forum, it is a great place to find answers. 
 
I understand your notebook is not powering on.
 
I’ll need a few more details to dissect your concern & provide an accurate solution: 
 
Can you please help me with the model number?
How long are you facing this problem?
 
However, click here to perform a hard reset.
 
Keep me posted, how it goes!
If the information I’ve provided was helpful.
Give us some reinforcement by clicking the solution and kudos buttons, that’ll help us and others see that we’ve got the answers!
Good Luck.