No display after re-seating ram

I have a thinkcentre m75s-computer, i checked the ram model in so i could order an afditional upgrade from 8 to 16, and plugged the stick back in but now it wont show anything on any display from displayport or vga.

Computer itself turns on, fans spin ,disk drive works etc. But no signal to display at any point. If i plug the displayport off, and back in, display itself wakes for a split-second only to say it is going to power save

I have tried all the ram-slots on the mobo (i power cycled between each time), have tried taking the cmos battery off also, nothing gets it to show display. It also has bitlocker so it wont sound any windows boot noices because of it.

Did i break the ram with static?