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Try unplugging your printer from the wall outlet and leaving it that way for ~30min. If this does no help then it means that a fuse has burnt out somwhere in the device. Sadly there is no manual on how to disasemble a F4140, plus it would void your waranty. I suggest you try to return it under waranty, just don't say you don't know why it stopped working ;]
Have you checked your paper that is fed on the bay...maybe there's a foreign material that is present inside because most of the printers nowadays are very sensitive especially on dust that triggers to false positive detection to your computer.
It appears I lost you in Live Chat, at any rate based on the information you have provided, I can only determine there was a hardware malfunction, possibly caused by the jame and the unit most likely needs to be serviced, sorry I could not be of more help.
The squeeling I think has to do with a small build up of ink on the carriage.
What I do is I open up the printer top so you can see the carriage as if you were putting in a printhead and then you unplug the power to the printer when teh carriage is in the unlocked position. Now you can freely move the carriage back and forth. If you notice there is a clearish long strip going from one side of the printer to the other that is placed flat ontop of the entire metal inside casing of the printer. Clean that entire strip with a cloth or something. Now take a piece of paper and fold it a few times so that it ends up looking like a ruler you can say. Put the paper flat on that clear strip and then take the carriage and move it over the paper. Basically your cleaning the underpart of the carriage that touches that clear strip that is attached to the metal body of the printer. Move it back and forth and you will see ink being put onto the paper thus cleaning it.
Just close the case up, plug in your printer and the squeaking should be solved till next time. As for that light problem, don't know what those lights mean. If there is a problem with teh printhead or ink though it will always tell you on the digital read out, or at least should.