If you have tried to upgrade your firmware, the new one cannot cope with the old network jetdirect firmware. You had to upgrade the Jetdirect firmware first. Now, remove the network card and see if the printer goes "Ready". If so, the problem is isolated. Now you have to find a way to update the jetdirect firmware. Probably with another printer or see if the ftp method works even with the error on the printer at this site: https://support.hp.com/bg-en/document/bpj07429
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