Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
First, try doing a photocopy with the printer.
- if it photocopies, the ink cartridges are all OK.
Then, if WiFi printing is still 'offline', try restarting both the printer (but turning it Off, and waiting 2 minutes, then turning it On again), then then restarting the computer.
Let me know how that goes, please. Thanks.