Not good!!! Most computer components run on gray smoke -- if you let the gray smoke out, they quit operating. The "fan bump" you described usually occurs when the PS is cycled on without a load or with a load that is too high for the PS to sustain. Check your load resistor to be sure it is still intact and that nothing has burned thru on the bottom of the PCB. Driving 120 V A/C thru a low voltage solid state switch has probably toasted the PS. Careful examination looking for obvious burned components or an extensive circuit check is probably your only hope -- and not very good without a schematic. I know of no other way to power up a switching mode PS except thru the Power-On cable. Sorry.

Regards,
Andrew