HP ProDesk 400 G5 (6GE67AV) Bios

[aimebob]

Hi;
After a black screen and fan spinning at 100% on every boot, some diagnostics lead me believe that the bios is corrupt. I'm looking for a fresh new copy of this PC
I have an HP ProDesk 400 G5 (6GE67AV)
S/N : 8CC9325F9H
SKU : 6GE67AV
Your help is really appreciated.

thanks