The first two screws are longer than the two from under the padding, so keep them separate.

With the screws removed, the driver (speaker) can now simply removed by just folding it over.

There is a small PCB to which the driver (speaker) mounts. Check the solder connections of the driver (speaker) to the board, as well as the components on this board. It consist of a few caps, resistors, and a coil.