@goldenear19; What's with the Audio Research bashing? It's okay that you don't like Audio Research for your own personal reasons. However, in my opinion, most things are over priced and over hyped. So, include all the other items out there in your response.
Audio Research, like Atmosphere, and many others make excellent products and they keep people employed.
Audio Research quoted the OP a price for repairing the device. They are one of the few companies out there (Martin Logan and Atmosphere comes to mind) that will still repair just about all of their previous products. That is saying something. A complete stuffed circuit board ain't cheap. To take apart and test individual components and also a multi layer circuit board that may have fried internal traces is just to complicated and expensive, so they quoted replacing the entire board. At least they still have that board around to replace. That is also saying something. If there are very small on-board circuits instead of through hole components, that also adds another costly level of diagnosis and repair.
Lets put aside the fact that we have a completely untrained cat that urinated on a very expensive piece, or a cat that was seriously trying to get the OP's attention (which the cat did), if by some other means a person fried the entire circuit board, it would still cost a pretty penny to either repair it or replace it. I don't care who the manufacturer is in this case. It's going to cost serious money to repair.
Get if fixed, or replace it, but definitely train that cat.
enjoy