Thank you for posting on the HP Support Community.
What is the product number of your device? Use this link to find it: http://support.hp.com/us-en/document/c03754824 (Ensure you do not share any of your personal information such as serial, phone number, email ID, etc...).
What is the operating system?
While you respond to that, let's try these steps:
Firstly, perform Hard Reset: Follow steps from the link: https://hp.care/2GnkMa8. (if the computer doesn't start up/power on you can skip the next step)
Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
ECHO_LAKE I am an HP Employee
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