I have an Asus Essentio CM5571 that works just fine, but after installing even just one 4GB DDR3 PC3-12800, (recommended by Crucial scan) only the power button lights up, and the PSU fan, but no video output or even a beep. I have tried the new RAM by itself, one or the other, and both together, but I get the same result. As an experienced tech, I've installed RAM a million times and I've taken great care to seat it, but the MB will only power up with the old ram, which are Nanya 2GB PC3-10600 1333. What should I do now?
Thanks in advance!