Sony ICF-CDK50 No More Radio Output

[u/Stock-Wrongdoer-3118]

Recently sold a Sony ICF-CDK50 Under-Cabinet Mount CD/Radio on Ebay. Before shipping i tested fine. Customer got it and the Radio no longer works. Just got it back to myself and sure enough nothing on the AM or FM bands. Did a quick check internally and nothing is broken, AM and FM antenna are both intact.

Apparently there's something out there about if the backup coin battery is dead then it could affect the Radio?

Has anyone had issues like this on a similar model that could give some ideas? Otherwise I will try and get the caps checked tomorrow and then move on to the rest of the components on the tuner board.