I bought and replaced some new memory cards (PC4-25600) for a notebook PC (NEC, purchased in Japan) already running FreeBSD. The RAM cards fitted perfected into the slots. However, upon turning on, FreeBSD does not boot up and the screen is blank. I don't think it is even getting through the BIOS. Is it possible that the BIOS/manufacturer can "lock-in" the memory cards? Or is it a problem with FreeBSD?