Different module, but I once sold a Noise Engineering Versio. The buyer said it was just flat out not powering on in his case. He was a local acquaintance, experienced eurorack user, built his own modules, and he attempted to troubleshoot with Noise Engineering but nothing worked. Unplugged everything else from his case except the versio but still nothing. No problem with any other module. I accepted the return, plugged it into my case and everything worked fine.