I bought an ECS A790GXM-AD3 motherboard, with a card GeForce 9800GT graphics, in my computer in which I am working on windows 7. Just right while mounted, however when the PC starts to go into the bios of power windows is not able to access the bios, I attempted the entire the keys on my keyboard, etc. however nothing effort. In a shop I have been told that motherboard is incorrect, however I favor to ask you before any answer. Please assist me soon.