[LDS]

Have you got a multimeter handy? I would check for continuity between the fader PSU heatsink and ground/chassis of both the new and old (once reinstalled) supplies just to make sure they are the same. Sager has a strange habit of sometimes configuring/insulating their PSUs different between production runs. The Avid supplies float all of the transistors from the grounded heat sinks using thermal insulation pads. A lot of Sager replacements tie the transistors directly to the heatsinks which get grounded when installed in the D Command.

In the latter, grounding the heat sinks will also drag the voltage rails down and it will look exactly like the PSU has failed again. It can also be accompanied by a lot of audible transformer buzzing. Running it in this configuration for any decent period of time will fry the PSU.


Factory resets can also solve a lot of weird issues.