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Something electrical has blown in the machine causing the fuse to blow. After replacing the fuse , the machine isn't going because whatever blew is now "open circuit" Have a look for obvious blow outs on any of the switches, control boards , all other electrical components and the wiring. look for telltale black marks where something has "blown" on the cabinet or around the components.
As the control board failed it could have let too much power reach any of the other components in the machine. Any electronic components could now be damaged. The new controller could now be damaged by power from the other parts. You could carefully replace them all one by one until it works, but this will be expensive. Buy a used machine of the same make and model (search Ebay) and swap all its electronics over in one go. Or replace the machine.
If there is power to the machine and the display panel doesn't show any lights when 'power' is pressed there is a good chance that a fuse has failed in the motor controller module or that the module itself has failed.
Motor modules can fail when another component fails and overloads the module.
Modules should not be replaced without first checking the other electical components in the machine for resistance and/or continuity.
It's probably best to call an experienced tech who is familiar with F&P machines. I'm sorry not to help you fix the problem your self, but you can easily do more damage to the machine by not thoroughly checking and testing the machine. A repairer who is experienced won't replace a component without testing, and you won't have to pay for parts which might fail on installation..
Unfortunately you've probably got a failed Motor Controller Board. This could be because of a water leak, or another component failed...When servicing F&P machines all components should be checked for resistance...Good luck....Nomess
There is an electronic component called a supressor, used to filter interference by your machine to the power in your home which may cause radios & TVs etc to have sound crackle or lines on the image each time you press the pedal........it is not essential to the safe function of the machine, tho' domestic harmony may be strained if others are watching TV at the same time you sew............but it doesn't always cause interference even without the suppressor
You may also have noticed a small amount of smoke and an acrid smell when this component failed.
Generally they are located in the foot control, although some machines bury them inside the main body somewhere near the power inlet.
Ensure machine is unplugged and have a look inside the foot pedal for a rectangular "electronic" looking component with two stout wires.......it will probably be a brown yellow with oozing nasty thick brown gunge.....undo connectors and remove it ....wipe excess nasty stuff off and any associated residue with a fast drying solvent like denatured spirit or metholated spirit.
Now, with the offender removed, re-assemble foot control and you are back in business..............if the component is inside the machine, it will look the same, but the exact location may take some finding......open the base and look near the power inlet for something bearing the former description.