post4dPCI POST Code Display POST4D During the Power On Self-Test (POST), most PC BIOS write diagnostic codes to port 80h or 84 (jumper selection). Use POST4D to display these codes onI’ve sned up for Asus’s forums but that requires A 24-hour waiting period. Cool. yes found out that it was in the OEM Post Memory range but i also get the red cpu led that stays on so i think