This is from Jeff's website--
Several resistors in the SE-40 are operating at or near their power limit. Some are experiencing voltage exceeding their max design limit. In many cases, the SE-40 comes with low quality electrolytics. Some caps are exposed to voltages which exceed their rating. Either way, your old electrolytics are quite tired. The factory cathode resistors are a recipe for disaster. One of the rectifiers is a ticking time bomb. Aged power switches are known to introduce noise.
I have no idea if mine have been fixed, or if there's even anything wrong with them. They both have all new tubes, I have turned them on briefly to make sure they work, which they do and sound great, but being so unreliable has me afraid to turn them on, so they just gather dust.
David