My replaced unit only makes some sounds as it loads the disc. During play it is almost completely silent.
A proper functioning unit should be quiet.
I purchased my unit from Underwood Wally who was all about customer service pertaining to the issues with the RS2-T's he sold.
The distributor's rep Jesse on initial contact was discussing repairing the unit. That was not acceptable to me and at that point Wally was involved and new units not only for me but other Wally customers were to be supplied when available.