On Mar 21, 12:06*am, OnkyoMan
wrote:
Yesterday, I left the radio out in my 40F degree garage for about 9
hours, then turned it on, while I was out there with it.

No difference in radio behavior... FM came in strong for 2 mins, then
disappeared. *AM was completely dead.

Do you still think it could be thermal related?

--
OnkyoMan

It is too early tell . Have you tried using an External p/s and notice
any difference ? While powering it up can you measure the current and
notice if it is same as when it goes into the non-fuctional
condition ? Also , by tapping on the cabinet , is there an
intermittant connection somewhere ?