Modern PCBs are manufactured with more advanced design methods and processes and are less prone to error.
Contemporary PCBs consist of multiple layers necessary to house complex circuitry making PCB repair service a tougher process.
Before actually latching on to the repair work on a printed circuit board, we must identify the root cause of the problem.
In electrical circuits the electrical components are generally arranged (connected) in Mixed, Parallel or Series connections.
For comparison, the similarities between all defective PCBs should be examined and compared and contrasted with functional PCBs.
The current, inductance, voltage and resistance etc., should be computed and contrasted to determine what’s wrong.