The HP OfficeJet Pro 6970 can go offline for several reasons and in order to fix Offline Error with HP Printer, here are the steps that will help:
First of all, turn on the computer which is connected to your printer.
Now, move towards the start menu and select the ‘Drivers and Printers’ option.
Then select the HP OfficeJet Pro 6970 Printer from the list of printers.
Then click on the option ‘See what’s printing’ and then click on ‘Use printer online’.
These were the simple steps to get your HP printer back online. If this doesn’t help; you can try the given troubleshooting methods:
Restart your printer but turning it off and then on again. Keep the printer off for a while so that it can fix the bugs and issues.
The network also plays a major role here so make sure that the network and your device is properly connected to the printer.
Check the connection status from the backside of the printer, the light should always show as green.
Make sure that the latest version of the drivers and software has been installed for your printer.
You can even use the in-built printer troubleshooter to fix the issue.
Read this also: http://www.printeralign.de.rs/blog/post/how-to-convert-hp-1020-printer-to-wireless-39825