X300 64781HU rendered useless after enabling Security option in BIOS. F10 to Save BIOS Changes, System starts to restart, I hear 4 short beeps, screen stays black. I never see anything on the screen. The Power button stays lit along with the battery/plug and ThinkVantage buttons. Subsequent reboots produce the same results. I have no password enabled on startup or on the BIOS. Anyone know what to do?