There are some possibilities for HP printer offline. The reason behind HP printer offline, because printer losses the IP address from the router. Which is the source of internet connection, just because of a wireless router. HP printer is able to communicate to all the devices it shows offline. So in case printer gets turn off or goes into sleep mode, there might a chance router allot the same IP to another device. When hp printer again turn on, it might not pick up a new IP every time. If IP Address has not picked up, printer shows offline.
Another reason in case we change the wifi router password, the hp printer wouldn’t be able to speak to router. So printer doesn’t get connected back. It goes into the state where it says printer offline!
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