Reply 20 of 22, by treeman
There is some material that was shared not long ago which will be useful to you in learning some basics, here is a page regarding jumper repair
Also I would fix any trace that looks bad, black or is starting to corrode. It might have continuity today but tomorrow it may get worse, do it all at once then take out the motherboard 5 more times in the future
rewarding the wires it was mentioned to match the same size as the trace is, a bit hard to visually do but if its a small trace use a small wire big fat trace use bigger wire