What is dangerous about pre-testing?
Electric shock hazard is the most obvious danger. Television sets typically operate from 120-volt AC power, which can deliver a lethal shock under certain conditions. Tube-based electronic devices also convert AC power to much-higher voltages internally, typically 300 to 600 volts. Television sets also contain circuits which develop 5,000 to 30,000 volts. Virtually all electrical appliances can cause a fire if plugged in when some kind of fault condition exists internally. A small internal fire within the set can quickly become uncontrollable. Even if extinguished promptly, serious property damage from smoke or noxious odors can result. Certain parts inside a television set can also rupture violently under certain conditions, propelling fragments of glass, metal, or other materials with great force. Noxious fumes or hazardous chemicals may also spill from inside certain components.
