Hi @ Biker MacBikeFace,
It may or may not be a "big fix". Only testing can determine that.
Here's a link to the [http://smanuals.ru/files.html?file_id=7863|service manual] for your receiver which should be of some help.
Only p.13 section 2.2 of the manual you’ll find the flow charts for the red light protection mode. Depending on which condition is being shown the problem is either in the power amp circuit or the temperature detection circuit.
After that you’ll have to use the schematic diagrams found on p.21/22 to determine where the fault lies.