... no components in wrong place, no reverse components, no ... no cold solder ,lack of components, no tin dross, no short-circuit, no open circuit, no bad led indicator ,no high voltage, no low voltage, no ... ,no bomb unit, no high voltage, no low voltage, no bad ... power, no high voltage, no low voltage, no bad led ... no scratched case, no cracked wires ,no missing screw, no label ... To make sure no bomb unit, every ...