By brown dots do you mean the the first true leaves have dried up? If thats the case your seedling is done I would pop another one. But to expect different results from the same process is foolish, so figure out what may have gone wrong first.

Over watering will do that so will soil that is too hot for a seedling. I have the best luck using something inert for popping seedlings like rapid rooters, rock wool or just coco coir. If its a seed I have had for a while I will soak them over night in a shot glass of water and if the hulls are not coming off try raising the humidity