While I don't take any pride in being a good salesperson, I do take pride in being a good service person. These power supplies were a disappointment for me. I worked very hard to try to fix them but I failed. I really would need a schematic to have a chance. I had to swallow my pride and farm the work out to another person that specializes in these power supplies. I can offer them for sale. I have several at the time of writing but I may need 2-3 weeks for warranty service as might have to farm them out again if I run low.