@Carlosfromaelet
Thank you for joining HP Forums.
I'll be glad to help you 🙂
As I understand you want to update the BIOS while the hard drive isn't detected,
Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:
Did you run a hardware test on the HDD to ensure the drive is still functional?
Have you attempted to update the BIOS using a flash drive?
While you respond to that, here's a link that contains details on how to update BIOS using a flash drive: Click here
And yes, you should be able to update without the HDD as well.
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Regards,
Riddle_Decipher
I am an HP Employee