If you are not a pretend electrician then you must be qualified. If it was simple to you then you wouldn't be asking!
It could still work but you have just lived up the cylinder. Things like this have happened, hence why you shouldn't touch it if you have issues. Go on a free course and find out how it all works before you mess in soneones house.
There are many people that bodge because a little knowledge is dangerous. You should see some of the gas jobs we come across because people think that they know what they are doing and clearly dont. You can't see most electricity, you can't see carbon monoxide. We are only looking out for your back.