IIRC, 'A0' actually means that control has been handed over to the boot device... I've seen this when I had the GP Diag card connected. So it *technically* isn't an error. I do agree that Asus should document these codes, but I think they need to get that info from AMI.
Hi i am new to the forums please help, Iam also getting this AO Postcode on my asus P8Z68 Deluxe mobo, sems i only got it after updating the bios with the latest Asus bios update, are you saying ignore this AO postcode as its nothing to worry about?