Some if not all of the ink stain is likely permanent thanks to being baked on by the dryer heat. What you can try to do is remove as much as possible with a Ink Remover product. Using a sponge and the Ink Remover carefully wipe down the inside of the dryer. After this re-wipe the inside of the dryer with a slightly damp sponge and a mild soap solution then dry with a towel, leave the door open to ventilate for awhile. The top load model the belts are underneath.
Most microwaves do have an internal fuse.
The manufacturers generally do not provide easy access to these for safety reasons. If the internal fuse has tripped, it is best to have the machine checked, the technician needs to determine if the fuse tripped for any particular reason. Remember microwaves are dealing with high voltage and radio waves, safety should always come first. Have a technician check it out. Dryers generally do not have a fuse rather they are controlled by your house breaker or fuse panel.