RCA RTD255 System "buzzing cooling fan sound" Questions

...buzzing sound that sounds like a motor spinning rapidly inside the unit. sometimes sounds faster than others. noticed more frequent if system or even room temp is cold. is this repairable? I have a ...

...buzzing noise then a ton of smoke as the cooling fan pushed the smoke out of the case. Was using it on aux 1 in on emulation with a set of rca speakers i already had feom another unit as the speakers ...