Hello Lodisteve,
Welcome to the HP Forums! I hope you enjoy your experience!
I understand the computer will not start properly and a black screen remains. I will do my best to assist you! To troubleshoot the issue, please try the steps in this HP document: Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot
The document lists useful steps starting with resetting the product. More specific steps are explained depending on your issue. I believe this troubleshooting will resolve the issue. If not, I would contact HP phone support for further assistance. You can utilize this website to learn how to contact HP appropriately, based on your region: Contact HP Worldwide
Please let me know if you have any other questions or concerns. Thank you for posting on the HP Forums. Have a great day!
Mario
