Hi I m posting new post with new details and need some opinions(other than get a real tech).Went back to Brother MFC 8660 today and Toner message has disappeared,but as soon as you try to print from any one of 2 computers networked to this printer the yellow status light flashes and no print occurs, I can copy and fax on machine though.I checked error history log but there are no real errors other than tray empty errors(but again I can copy all day on machine)Sometimes just plugging network into printer trggers the flashing status light.I was about to puit new Main pwb(seems like pain to program) in machine when I remembered they had same model but with problems on it in storage area.I plugged it into network(Ip address is on auto and configuration printout Ip address was now present).I tried to print from same 2 computers to this printer ,it did not print ,but status lite didn't flash either as it did with other printer ,print jobs stayed in q). Do you think as I do that this must be network issue? THANKS ANDY
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