1998 Volvo S70 Power Window/Mirrors Failure

This seems to be a somewhat common problem, but I’m not sure which part is causing it. The last time the windows worked, a small puff of smoke exited the speaker on the driver’s side door (luckily this was as I was putting the window up). It hasn’t worked since then, and none of the controls on any other door works either for the windows. I noticed that the power mirrors control don’t work either, and that the lights in the door panel don’t work either (that glow in the little icons on each button/knob). What’s causing this? The master control? The motor? A relay? Thanks in advance!