Lets work ya through it. I've destroyed about 4 Boss pedals in my time by over-modding them. Modding, remodding, remodding, and testing all sorts of things until the solder traces couldnt take it anymore. But there are ways around it when a solder trace lifts. Follow that trace to where it ends up. Cut the lead of the component that would go into the lifted trace so that it doesnt make it through the hole in the board. run a wire on top of the board (component side) from the now shortened lead to the lead on the component that the trace would have gone to. You may need to replace the two components in question so you can have leads that stick out from the top of the board. Otherwise, you could try running the wire on the bottom of the board.
Reheat every solder joint just to get the solder to "flow" again and rebond to the metal you could have a cold joint somewhere. As far as the LED not lighting, check the orange and green wires that come off the tiny LED board that they are fully into the main board.
Try those things, report back. We'll try and get it working.
Joe