Help, I changed a lightbulb, it sparked now it will not turn on.?
Try plugging another lamp that works in the same outlet. If the second lamp works, then the breaker is not tripped. Look for a small fuse in the plug of the lamp. Some have them, some don't. If the second lamp will not work, then the fuse or breaker at the panel has blown/tripped.
Try plugging the lamp that sparked in another outlet you know is energized (hot). If it still does not work, and the outlet continues to be energized (hot), it will be necessary to repair the lamp.
Help, I changed a lightbulb, it sparked now it will not turn on.?
You tripped the breaker. Go to the main panel and switch it back on.
La Bong is right