The symptoms of a blown F2 fuse are as follows:
The print head will not fire a single nozzle. The machine will power up normally, and the print head carriage will move back and forth normally but not a single nozzle will fire. If any nozzles fire, then the F2 is intact and you should look for another cause. To repair a F2 fuse problem, it is necessary to have a trained technician replace the Print Engine PCBA: Part Number 100500.