... 2.Short circuit, overload protection 3.CE,FCC,ROHS E.U. plug 12W AC/DC desktop adapter with CE FCC ... sure 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 output ... 6. Visual full inspection: to make sure no scratched case, no cracked wires ,no missing screw, no label misaligned, etc2 sampling inspection:IQC ( ...