Hello, everyone, after our Varian 5000 spectrophotometer is turned on, the deuterium lamp does not light up, the measuring deuterium lamp power cord has no voltage output, and the tungsten lamp lights up normally. The machine is turned on normally, and the error code E9416 is displayed after the software is connected. There is no problem with the deuterium lamp, and it can be lit on other machines of the same type. I sincerely ask you to give some pointers about the reason, thank you very much! We are expecting a reply! Thanks again! Thanks!