Hi @countyman66 ,
Here’s the [https://www.manualslib.com/manual/889046/Kenwood-Eleven-Iii-Kr-1000-Iii.html#manual|service manual] for the receiver.
It has the schematics which will help you to find out what’s wrong - see p.30. It also has a parts list -see p.13. If there is a faulty part that needs replacing, try searching online using the part number to hopefully get results for suppliers.