The HP Printer is usually the result of a combination of technical glitches. HP Printer offline error:
Step 1: Reset your HP Printer by switching off and then switch it back on.
Step 2: Check the HP Printer paper tray and remove any paper clips or pins.
Step 3: See that there are no external obstructions blocking your HP printer.
Step 4: Open the control panel and set up your HP printer as the default printer.
If you find the printer status is offline, you can call the HP customer service number and ask for additional technical support.