09-08-2016 09:12 PM
09-12-2016 09:58 AM
Thank you for visiting the HP Forums! A great place where you can find solutions for your issues with help from the community!
I understand that you are unable to boot into your PC.
As you mentioned that the screen is stuck at system BIOS firmware is being updated.
This is a problem with system board you have to contact HP to get your laptop serviced.
Please contact HP phone support using this link: http://hp.care/2bkTGBQ
Let me know if this works.
Have a great day!
I am an HP Employee