Printer stopped working

Either the printer is now bad, you don't have it selected/set up properlyor, it is just a glitch....

reinstall it and software if necessary, eliminating the glitch portion....try another USB port.....

a lot of usb printer require you load the printer before attaching the usb plug. Start with the software disk and fully run the install. It will often tell you in the instructions if this is the case and let you know during the instillation process when to attach the usb cord.