I have about 6 of these hp printers at a location that stop printing. Only the hp product our other models are fine. You send a test page and it won't print you ping the machine and the first reply is missing and the rest come back as a replys. On its own right after the pings it will print out the test page on its own and will print fine for a period of time The os system is mac 10.58 and newer any ideas?

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