It looks like an inductor with just 2 solder pads. If so it should stick to a magnet. And it's surprising it works without it as something will now be an open circuit.
Perhaps if you could post a photo we could have a guess. Is it the grey component at the top of the board in this picture?
https://www.back-bone.ca/wp-content/uploads/2013/10/IMG_4907.jpg
It looks like an inductor with just 2 solder pads. If so it should stick to a magnet. And it's surprising it works without it as something will now be an open circuit.