When we receive parts in, they get sent straight to repair, they do not get tested before being repaired. Since all we do is repair circuit boards, we presume that any circuit board you send us needs to be repaired. We encourage our customers to field-test your boards before sending them in for repair: swap your board into a working machine or put a good board in the machine with the problem to determine if the circuit board is bad or if the problem is elsewhere in your machine.
Once we receive your circuit boards, they get thoroughly cleaned and all the parts that tend to fail on that style of board are replaced (even if they have not gone bad on your board). Next, the control boards go to our trained technicians who repair any broken solder connections or burned trace lines, replace any additional components that are damaged, and then hook-up the control boards to our test simulators for final testing.