I already sent it back to him, apparently it is unrecoverable. Sounds like he's no longer making the driver that he used in my light. This causes me great sadness. I would not expect anything from him as I beat the ever loving snot out of that light over a period of several years; it was a faithful companion. I can deal without having a high CRI emitter, but I am addicted to the control ring. I picked another up when Battery Junction (I think?) had them for cheap but what's her face has adopted that light, and I need one for myself.