tu peut reflashe le bios avec une ancienne carte graphique pci comme celle ci
http://images.google.dz/imgres?imgurl=http://img.diytrade.com/cdimg/441772/3605781/0/1211189319/GV-600_s_PCI_CARD_DVR_CARD.jpg&imgrefurl=http://www.diytrade.com/china/4/products/2886884/GV-600_s_PCI_CARD_DVR_CARD.html&usg=__Layze9g_ltFNPira5iw6Reqgzyg=&h=768&w=1024&sz=89&hl=ar&start=8&tbnid=U8Cm44XLjnr_kM:&tbnh=113&tbnw=150&prev=/images%3Fq%3Dvideo%2Bcard%2Bpci%26gbv%3D2%26hl%3Dar%26client%3Dfirefox-a%26rls%3Dorg.mozilla:ar:official%26sa%3DG