Took my Levinson amp in for repair

What agreement did you have with this repair shop?

What was documented when dropping it off?

Any witnesses that saw the unit working while in their possesion?

You can do something about this IF you have some good documentation. They have in their possesion an amp that they may have never been able to fix in the first place.

Negligence could be that they can't work on this type of amp but took a chance anyways.

You don’t have a snow ball’s chance in Hades of winning your claim. Focus your efforts on getting your amp repaired.

Markpao, I was also wondering why we haven't heard from the other party.

Abruce do you know if the electrolytic from the caps has gone all over the circuit board(s)?
In my working on these types of problems I find that the leaking caps cause shorts;any chance you know if the area involved is large,small and what other types of components are in the affected area.
Maybe the board can be removed and cleaned in a solvent tank to aid in better troubleshooting of the affected area;thats even if the repair shop has that capability or you can find another source for repair.

Unless you signed a waiver of responsibility here is what I would do.

Find out exactly which capacitor was leaking. Email the manufacture describing the problem and the leak. Ask for an estimate for repair.

Send the amplifier to the manufacture and get an estimate for the repair of the catastrophic failure.

File a claim in your local Small Claims Court. Testify with both estimates and the verbal, "pretty much blew it up,," as well as the admission they plugged it in after they noticed the leak.

Detail all your costs such as shipping, travel, and time spent.

Your showing due diligence for a minor problem and they're returning you their failure.