Hello
I have X32 Rack from very first batch - about one year ago it started making occasional noise, when stage was "shaky" - I opened it up and found one bad solder-connect in PSU - the component was not inserted right, so it was having interrupt connection. After resoldering that part the unit has been flawless. Takes travelling and storage in back of truck here in northern winter and humid summer . . no issues.
I have X32 Rack from very first batch - about one year ago it started making occasional noise, when stage was "shaky" - I opened it up and found one bad solder-connect in PSU - the component was not inserted right, so it was having interrupt connection. After resoldering that part the unit has been flawless. Takes travelling and storage in back of truck here in northern winter and humid summer . . no issues.