... lack of components, no tindross, no short-circuit, no open circuit, no bad led indicator, no high voltage, no low voltage, no output, etc. 3. ... with high temperature resistance, with power,no bomb unit, no high voltage, no low voltage, no bad led indicator, etc. 5 ... Visual full inspection: to make sure no scratched case, no cracked wires, no missing screw,no label misaligned, etc.2.Sampling inspection ...