Wow!! i think i remember you discussing this on RCN! Well, it was a nightmare to get someone to finally FIX the damn thing. I could open up the PSU and take some pix, as well as some pix of what else he might have modified. The tech was contacted through the person i bought the mixer through (who got it from Germany) This person built me a PSU for it and i worked great..for about 2 HOURS! then silence. After 6 months of arguing with this certain individual about getting this thing working he called in a favor to a local studio tech. I dropped the item off at a P.O. box and picked it up a week or so later. Had to split the repair cost with person who orig. made the deal with me, and i was encouraged to NOT contact the tech, as he is "reclusive and private" Ugg....sorry to blather on about this ordeal, but i'd spent alot of $$ with this person purchasing his racked Telefunken gear and felt his customer service on this Studer as well as the other Telefunken items purchased, was incredibly effed up. Anyway, let me know anything you need me to shoot pix of, and i have emailed the tech about looking at some other gear, seems nice enough, i might could ask him what he actually did, and if he kept any notes, and or schems...."WE CAN REBUILD HIM!! We HAVE the technology!!"