MY 8600 PRO N911G WAS PRINTING FINE AND IN THE MIDDLE OF A PRINT JOB IT TURN ITSELF OFF. I PRESSED THE ON BUTTON AND RESTARTED IT. IT THEN PRINTED VERY POOR QUALITY. INK LEVEL IS GOOD. I HAVE CLEANED AND ALIGNED THE PRINTHEADS, UNPLUGGED AND RESTARTED BUT THAT HAS NOT FIXED THE PROBLEM. WE ALSO HAD A WIN 10 UPGRADE ON 8/12/2020.
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