Red light went on on one of my Ayre MX-R amps

Read through the manual and the red LED indicates DC on the amplifiers incoming signal.
If it has never happened before do not worry about it. the sort of device that checks for it is very sensitive, and may have just had a 'cosmic ray' hiccup. Or something like that. Poltergeist activity is also a possible reason, if the cosmic ray seems too far out.
Anyway, don't worry be happy. If it happens again, do the same thing. If it starts happening all the time, THEN worry.

Liz, LOL!

Never read an owners manual where a LED can be so many colors.
Green, blue, red, yellow, violet, orange. Each color is an indication of a different problem. so folks who are color blind should be warned not to buy this electrical device!

Roxanne!!

I unplugged ny MX-R's last night. Blue to green when turned to stand by. When unplugged I think they switched to Red=>violet=>orange=>green (I think)=>nothing.