I am a soldering god!
Well, not quite. Not even close. But I feel like one. I have fixed my HDD audio player (again) after I managed to break it (again).
I found that the solder pad for the right audio channel had come off a circuit board. I don’t believe that is easy to fix. So I did the next best thing. A blatant hackjob. I found some thin wire (yay for random cruft), cut it up and after much fiddling and a little guesswork, soldered it between the left and right pins on the audio connector, thus providing sound to both ears. Yay!
Hope it doesn’t break again.