Unfortunately we live in a plug-and-play and throw-it-away society. Younger technicians, and even some older ones, often fail to meter their wires before powering up a possibly lightning-damaged system. All too often this can result in the unnecessary loss of valuable circuit boards.
In situations where it is suspected that lightning has struck, technicians should proceed with caution. The first rule of thumb is to ask questions and use your meter to determine the existence of ground faults on any wires that may be suspect.