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The only thing I can think of is if you had them connected to the port and then enabled and disabled the port through device manager.. That or try to print something to the parallel port, causing activity.. Frankly, I've never heard of anyone wanting to do this, so I couldn't find anything online, nor do I own any LEDs to try, so I'm unable to back up my suggestions.

First you are going to be able to desire to let us know what form of pc is a house pc or cellular device Secondly, you are going to be able to desire to furnish us with further strategies with reference to the prevalent of the printer 0.33 port serial port () is one in each of the previous styles of printer ports particularly as a results of fact the ports are all now () IV to the twine, you are going to be able to desire to be certain there is this port on your pc as a results of fact contemporary units has exchange right into a port is the port that's an oblong is composed of 25 needle is in the back of the seen show unit next to the port and the mouse, keyboard, and right here i might desire to comprehend what form of pc finally, you are going to be able to desire to link your cable between the printer and the pc will seem in front of the device which you have a sparkling CD you enter the induction of the printer and then the subsequent and thank you