I have seen a previous one yesterday, I ended up taking out the memory and giving it 30 secs before reseating. I tried it and it powered up. I think it could be static build-up that I’ve seen mentioned else where as the memory was well seated.
Hey, it's possible that the mechanism skipped when unloading the last time, this means that things are happing at the wrong time. Does it sound as if it is jamming? the other thing to check is if there is a belt drive below it, I know they stopped using belts for this use, but maybe this one has one in there. When faced with this I would have turned off the power and manually turn the small wheel to see when it stops, that is another this ti t ry. Good luck