I run into this occasionally with my wi-fi connected Epson multi-function printer at home. And my wife has to actually switch wi-fi connections to print. It is all very mysterious. I think these printer tend to go to sleep and then take a while to wake up. Instead of turning it off, try just selecting some options on the printer and see if the communications return. 

I think the Mac printer cues also are not rechecking the printer situation automatically once they get no reply from the printer.  I suspect it is all in service of minimizing power usage over "always-on" convenience.


On 4/27/18 2:48 PM, Linda Feltner wrote:
[log in to unmask]"> HI All:
My HP laser printer has been real cranky. Then it ran out of toner. I replaced the toner yesterday.

Now it continues to do the same thing.  Each time I send something to print, it says "printer not connected". I flip it off then on, tell the file to "pause" then "resume" during the restart, and it prints.

Do you think it's dying, or I could check to see if the printer driver is up to date? I'm on Sierra 10.12.6, and have done recent security updates which may have done something with communicating with the printer. 

P.S. Yes, it's plugged in..... :)


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