I'm building a PC and the first boot went fine but when I physically installed the remaining hardware I got a boot disk system error so decided to uninstall the hardware and start installing one piece at a time. This is where the problem started. With only the MB, graphics card and keybord installed I rebooted and found that I could not enter CMOS, basically the first boot failed, I removed the battery to clear the CMOS and rebooted. At this point it entered CMOS but I could not navigate. I tried a couple keybords to see if that made a difference but it did not. Can anyone help to solve this problem or tell me what might be causing it? The MB is a ASUS A7V8X-X. I am using a PS2 keyboard with nothing fancy about it.