The HP FXN1 (part number E93839) is a custom motherboard designed exclusively for released around 2018-2021. It is not a retail board; you will only find it inside pre-built HP AIO systems like the HP 24-f , 24-g , or 27-p series.

If you are looking up the motherboard (spare part number E93839 ), you likely own an HP ProDesk 400 G5 or HP EliteDesk 705 G4 Small Form Factor (SFF) or Microtower (MT) PC.