McIntosh MC 8207 Power Guard problem.

Hi I just noticed the exact same problem with my MC-8207. First two unused lights came on and now the right channel. Were you able to ever figure out what’s wrong ?

BTW that "newly serviced " C-39 is for sale, in near new condition.

 I neglected to mention,  the Mac service tech did install the most current up-date,at that time, to my nearly new C-39 at no expense to me. Gee Thanks

Please be advised: several years ago I purchased a brand new C-39 from one of the most renowned Mac dealers in Ohio.  Shortly after setting the system up, we experienced a momentary power loss.When I went to re-start the system, it was completely dead, so I contacted my dealer and he suggested I send it back to McIntosh, at my expense of course, which I did. So, I called the McIntosh service dept. to find out the status of my C-39 and they told me there was nothing wrong with it..  It was then that I was informed you had to un-plug the power cord for 30sec. to allow a protection circuit to re-boot.  My response was, "where is that written in the manual" his response was "it isn't". I said well shouldn't it be? He said probably, but I don't write the manuals.The dealer,who was a Mac repair center didn't even know that. So at considerable shipping expenses to me,I learned to un-plug the C-39 power cord after a power shortage. Try re-booting your system by un-plugging the power cord for 30sec.

I hadn’t thought of doing that. Thanks for the suggestion.

I do not have that unit but have you tried resetting the microprocessors from the manual?