WD_Black SN850 not detected by BIOS on bootup from power-off

Step 1 Restart PC and press F2F8Del to enter BIOS Step 2 On the Main menu, expand SATA Configuration Step

Do you have other SATA drives connected? I know is some boards the secondary slot shares resources with SATA ports which could end up disabling one or the

m24 slot See if there is any device security setting in the BIOS to enabledisable the slot If not, I would suggest you contact the HP executive team at the link

m2_1 slot Ensure the drive is securely seated in the motherboard slot Gently re-seat the drive and re-connect any cables This could fix a loose