Description of the issue: After normal a/c startup advance throttle, engine instruments show selected throttle setting, throttles visually move correctly, but engines do not increase power, just stay at idle power. This is not the a/c wont move issue. Aircraft will start to roll with brakes release…

Interesting. Yes, the metars on the last few attempted flights were M3, and entered into the MCDU in the perf page as -3. And yes, engines were not feathered.