[bridkarl]

There was an earlier post by Ron about replacing power switches on radios with push buttons  - a problem I’m dealing with right now.
Just as an update to that - I think I found the identical part he describes still being sold at Lowes - I found it at the end of the electrical fittings aisle on the display with switches. I expect it’s in the same place at allLoees. 
The number is 427662 for $4.68. 

I still need to disassemble this to see if it’s the same but it seems identical. 

In the meantime I carefully bent two tabs underneath the switch cover. There’s a third tab but working with two is enough to get you access to the switch without more extensive removal of the entire push button assembly.

 That allowed me to spray the interior of the switch with De-Oxit Gold - wiping out the excess with a small pipe cleaner. After that I simply exercised the switch 20 or 30 times - which seems to latch correctly.
As I saw no evidence of physical damage or burning I’m hoping this is enough. Boring issue I realize but I thought an explanation might help before someone just cuts a switch off. Cleaning first seems a good idea and I haven’t seen a description of this anywhere.

This did nothing. Radio is still dead. I’ll wait for my replacement unit to arrive so I can check my wiring/repairs against an original unit and the schematic. This is the second or third time this has been recapped so there may have been errors introduced by previous owners I’ve missed. 

The next step after that is putting a jumper bypassing the switch and establish that the switch is truly dead. 
Which leads to a full replacement of the push button switch. Arghh.