Seems hardware problem. Test memory for errors.
Well
, i tested it with another PC and booted ok ( seems the first PC can't load bios addresses correctly )
BUT , when the monowall booted ok and i get menu while i want to auto detect my NIC ( Network Interface Card ) tell me
NO LINK-UP DETECTEDALSO , i test this PC with PFSENSE and it could detect my NIC ( RTL8139 , Dlink ) but i want to use monowall for my testing .