[harborman]

Originally Posted by harborman

I looks like some replaced a component where the solder flux is showing. I bet they then wanted to put power to the board and scratched that "+" mark to make better contact. They also scratched across those other wire paths. I would check those for continuity and maybe solder any broken connections. At least this is not "surface mount technology" like a lot of electronics today, then you need a microscope and special soldering tools to fix.

Upon a better look, this board is using some surface mount components. I would check the continuity on the leads that were scratched across. Who ever worked on this board were sloppy or did not know what they were doing. You need a good soldering iron made to repair this kind of board, with fine tips and controlled heat. I would take it to someone who has worked on boards like this and has the special soldering irons.