I picked up a DMG for a reasonable price recently, conscious of the fact that there were a few dead columns and that there was "no sound." After opening it up and fixing the dead columns, I plugged in a set of headphones to see whether I could get any audio. Sure enough, the audio worked fine through the headphone jack. Should I assume then that the speaker is faulty or possibly just has a weak connection? I am open to swapping it out for another if need be, but it would be cool to know how to fix it also.
I currently have no way of taking pictures. That being said, given what I've described so far, does anyone have any input? Am I on the right track? Is this a relatively practical repair to perform?