At Chattanooga's Manufacturing Repair and Overstock, Inc. - or MRO, for short - a growing crew of nearly 30 people receives, inspects and fixes automated industrial parts from across the country.

When everything used wires, it was easy to splice them or replace them. Not so much with PC boards, but everyone has their favorite method for repairing a broken trace. [Mr. SolderFix] has his five ...