One of the common problem which an printer encounters is printer offline. sometimes you can't print a document because your printer is offline. This frustrating problem can be resolved easily on a Hewlett-Packard (HP) printer or any brand printer . All that is needed to switch an printer from offline to online is a computer mouse or computer touch pad. To ensure another printing problem doesn't exist, though, check the printer for paper jams, proper installation of ink cartridges and low ink.
why is my printer offline
Check the blue light on the printer.
if the blue is solid that means your printer is connected to the wifi network.
if the blue is blinking that means the printer is not connected to the wifi network.
restart the printer and the computer or laptop.
Once your done with the second step
On your computer open control panel and the Go To VIEW DEVICE AND PRINTER
Now check the status of the printer
Still If the printer is offline select your printer and right click on it .
now click on troubleshoot
Once your click on troubleshoot it check every aspect of the printer.
After completing the troubleshooting your printer is online now
this of the simple and helpful step for hp printer offline issue.