Greetings,
Welcome to the forum.
I am not a HP employee.
Did you buy a brand new Desktop or Laptop? A product number only would help to identify your HP product.
Boot device not found usually means:
No operating may be installed,
The storage device is faulty,
Or the storage device may not be connected correctly to power or the to motherboard (data).
I would return to the seller. This is especially true if you have a Laptop or Notebook PC.
Regards