I was updating my BIOS with HP's driver update software and when I restart it nothing shows up on screen. I took it to the local computer repair shop and they said that the motherboard is bricked (unusable).
I have brought your issue to the attention of an appropriate team within HP. They will likely request information from you in order to look up your case details or product serial number. Please look for a private message from an identified HP contact. Additionally, keep in mind not to publicly post personal information (serial numbers and case details).
If you are unfamiliar with how the Forum's private message capability works, you can learn about that here.