My #@%$ Cat Destroyed My ARC REF 5SE. Soliciting Suggestions.

Bob is correct in that a cat or dog that has always been clean, has accidents when old, REALLY feel bad and don't understand. Any scolding at all is NOT called for! CLM, cats live's matter. All 9.

Why is there a question here?  Kill the cat, without damaging its coat.  Then have your taxidermist mount it on its hind legs with its front paws positioned so as to hold your record cleaning fluid container.  Then, place it next to your audio rack facing outward as a deterrent to its successors.  

gosh, you are so funny!

If your cats' urine was acid enough to etch a circut board, your cat had an issue....and likely needed a vet visit...or....
-Litter box needed a cleaning....if you got hung up in traffic, that's one if  it was used to 'regular maintainence' with its' box....
-Expression of 'discontent', if it was used to your appearance at the 'regular interval' ( they're as bad as dogs in that respect...).
-Possesion jealousy...if you gave your pre more attention that it, they're known to pick your fav object....esp. if they're not feeling good or pissed at you for neglect for some reason.

If your pre getting doused, or anything else for that matter, was unusual...you were getting a message....an expensive one in your case.

Spouse and I have had a number of cats over our decades...the worst one did was claw lp spines.  They are trainable to some degree, but you have to start with the kitten....the kitten you raise is going to be the cat you have.  

@bobauch Well said, sir.