The bottom right corner was completely snapped off. I have glued it back together, and resoldered the broken circuits. I tried it out, and it did fix the “no sound at all “ problem, but unfortunately I did mess something up , as now it blasts distortion when I turn the amp on, even with the volume turned completely down. I have pulled it out again and am going to check all the circuits that I reconnected.
I still wish to source a good used one, as my repair skills are limited at this stage.