Yamaha HTR-5890 cooling fan.
So my amp kept kicking out and getting super hot, after digging into the power supply side I found out it was no longer producing the 24VDC to the fan. Found a 24VDC power supply laying around and decided to wire it in. Incoming power off of the 120 ac switched side into the power supply and then from the power supply out to the fan. And best of all it all fits.
@123toid A new amp would be nice, bit I'll just keep using this one until I can't fix it anymore..