@ShamD
I reviewed your post and I understand that the computer shut down when you were doing a BIOS update.
Don’t worry, I assure you I will try my best to get this sorted.
I recommend you roll back to the BIOS to the previous version following the steps in the below article and check if it helps.
https://support.hp.com/in-en/document/c02693833
Let me know how it goes and you have a great day!
P.S: Welcome to the HP Support Community 😊
If you wish to show appreciation for my efforts, mark my post as Accept as Solution. Your feedback counts!
Cheers!
Stay Home – Stay Safe
The_Fossette
I am an HP Employee