Wouldn't be worth your time IMO, best to just buy a new one for like 7$. Unless you're up for the challenge :eg:
i assemble back but it is red color, original is green, maybe the KTP crsytal broke, n the red color light is not intense
i assemble back but it is red color, original is green, maybe the KTP crsytal broke, n the red color light is not intense