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HP DesignJet T530 36-in Printer

I have an HP T530 36” printer. When it goes to sleep or hibernates, (I don’t know the difference) it will not wake up. The power light stays lit but the screen is black and not responsive. The power button does nothing. I have to unplug the power cable and plug it in again, then it prints whatever I sent to it, even if it was days ago.

I have it set for TCP/IP Port, protocol: raw, raw setting port#: 9100, snmp status enabled.

firmware is upto date

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