has my hatch gone wrong???

I put 20 various eggs including 4 quail on march 17. So I was planning on seeing hatches Easter weekend. 1 small chick hatched , and 1 quail. I know that they were all good to go , but I have waited and no more have hatched. I removed 2 eggs , one chick was fully grown but didn't pip from the egg and had no life signs. The other egg the chick was still attached to a large yolk sac. the rest of the eggs are still in the incubator. we realized that about a week before our hatch date while at work we had a 5 hour power outage, but never thought about it till yesterday. Should I leave them for a couple of more days or just remove them and start again??