I am a hobbyist and recently acquired a dead Gameboy that I am going to attempt to repair. My first thought is to clean up the damage from leaking caps and batteries and replace the caps. I was trying to understand it a little better and happened upon the following schematic, however I am not sure what the X means at certain wire junctions. I am thinking it means it is not connected?
Further, the power switch has a strange wire symbol that curves up to a white rectangle. Not entirely sure if this is supposed to be a thermistor or something else?