for starters you solder joints are terrible, considering the amount of wire you have exposed on the PMS, you probably have a short. The stuff circled in yellow all look like current issues, and if not soon will be. and the one circled in blue iyou have red and a black wire soldered to the GND pad, im hoping those 3 wires are all ground.
if they are all ground, why are you tripling wiring to the 1 pad?, there are plenty of GND pads on the PMS
the other place you might have a short is the edge of the wii board, did you sand it fully?