If your HP Printer no longer responding to print requests, check for the following

• Whether your HP printer has been set as your default printer.
• Whether or not you have the correct port or a configured port.
• Whether or not you have disabled the ‘use offline’ mode.

Usually, if you use HP Print and Scan Doctor diagnostic tool, it can help Hp printer setup automatically and quickly. If it does not work and you need to turn your hp printer offline to online, try the following methods.

Basic troubleshooting for Windows

With an earlier version of windows you can open the start menu and then select “devices and printers.” In Windows 10, you can simply type it into the search bar to find it and solve Hp printer offline problems.

• Open “printers and devices,”
• Right select the icon of the preferred printer.
• Choose “Set as default printer”.
• Right select it again and choose “See what’s printing.”
• Open “Printer,” from the bar and untick “use printer offline,” and “pause printing,” if they are have ticked checkboxes.

If this is not the case, move on to the next step.

• Right select the printer icon of your choice and go to properties.

• “Change properties” as administrator.
• Click “Ports”.
• Select the printer you want and then press “configure port”
• Apply and save changes. Your device should be online after this.

This should also work for brother printer offline.

Basic troubleshooting for Mac (iMac)

If you are facing hp printer offline mac issues, here are some troubleshooting tips to help figure out why. The most common problems that make a printer appear offline for Mac are:

• Old printer drivers
• Network issues
• Loose cables
• Too many documents sent to the printer

Try each of these steps and keep checking if your printer has come online.

1. Make sure all of the cable connections between your printer and computer are secure. 
2. Open Apple menu and select "Software Update.” What this does is automatically install any available updates.
3. Open Apple menu and restart your computer.
4. Open system preferences from your Dock or the Apple menu.  Open "Print & Scan." If a yellow light appears next to the printer's name double-click your printer from the Printer list and press ‘resume.’

Check if these methods have worked. To do so you need to:

• Open any document
• Attempt to print it by pressing "Ctrl-P."
• Or, choose the preferred printer by clicking the "Change" button and clicking your printer from the list.
• Finally, select "Print."

In case of failure, you will need to reset your printer system. To reset your printer system, follow the steps given.

1. Open Apple menu and choose"System Preferences.”
2. Open "Print & Scan."
3. Press the "Ctrl" key and right-click simultaneously in the Printer list.
4. Select the "Reset Printing System,” option.
5. Click the "+" button and select your printer as it appears. If it is not there, click "Add Printer or Scanner." Choose your printer from list and click "Add." Download and install the printer driver, and try using your printer again.

If all else fails, it might be an hp printer paper jam.