Here is a composite view of a power supply I had to repair. This is a reduced size, the original is larger. It allowed me to reverse engineer the schematic and then repair it.
I flipped over the photo of the traces and superimposed a transparency of the components and annotated by hand in two different colors for traces and for components.
A good way to kill some time and forget your troubles. Very therapeutic. Especially recommended after an argument with the wife. (Or, better still, before even thinking of arguing.)