Why Is My Canon TS3700 Offline

The Canon TS3700 is typically "offline" when your computer cannot make contact with the printer. There are several possible causes for this type of communication failure: loss of Wi-Fi connection; a paused print job queue; an incorrect printer selected; and/or an obsolete driver. If you're using a USB cable, a loose connection will also create this issue.
The best thing about this is that having a "printer offline" message doesn't necessarily indicate that you need to send your printer away for repairs. You should first try some of the simplest things listed below and then if those don't work, consider taking other measures.
What Does “Offline” Mean on a Canon Printer?
Your computer will show the status "Offline" when it cannot send a print job to the selected printer via the connection.
Printers can turn on, but they will look like they are off-line. An example of this is when a printer is no longer communicating with your router, yet you are still able to access the Internet via your computer.
Technician's advice: Try to create a copy from the printer. If the copy is successful, then the fundamental printing operations are functioning properly. First, examine the connectivity issues, the print queue, and computer configuration.
Common Reasons for a Canon TS3700 Series Offline Message
The most likely causes are:
When the printer was disconnected from the Wi-Fi after a router restart or network changes occurred.
•    Different Networks: One computer is connected to one network, and the printer is connected to another. Or, one of those devices is connected to a "guest" network.
•    Paused or stuck print jobs: A failed job is preventing the queue from moving.
•    Your computer is using an older or duplicate printer when printing.
•    A driver issue or a port issue: The software which was installed and/or the settings that were used for the connection are different than those that are now on the printer.
•    USB Connections: Damage to the cable, a loose connection to the port, or a faulty hub can disrupt the connection.
In addition to the above-mentioned issues, there may be other problems with the printer that could cause it to stop printing. These include: paper jams, an empty paper tray, and error messages being displayed on the screen. Before attempting to fix any problem related to the computer, make sure to address each of these possible printer-related issues first.
Read More: Canon PIXMA TS3522 Setup
How to Fix a Canon TS3700 Printer Offline Error
1. Check the Printer’s Power and Display
Verify the printer has been powered on and is able to respond. Wake up the printer from its "sleep mode" by pushing one of the buttons on the control panel.
See if any warning lights or error codes are present. Examine the paper tray, cover and ink/toner cartridge to make sure they are properly installed. If an error code is displayed, consult the online manual for your specific Canon device.
When trying to resolve printing issues, it is recommended to not send multiple print commands to avoid having a backlog of unprinted documents when the printer is reconnected.
2. Restart the Printer and Computer
A restart can clear a temporary communication fault.
•    Turn the printer off using its power button.
•    Wait until it has fully shut down.
•    Turn it back on.
•    Restart your computer and try printing one page.
If your printer continues to be disconnected, you should power cycle your router and then wait until the network has completely restored itself prior to attempting to test the connection.
3. Check the Wi-Fi Connection
Make sure your printer and computer are connected to the same local area network (LAN). Do not use a "guest" Wi-Fi as this will likely prevent your devices from communicating with one another.
The TS3700 series has a built-in 2.4 GHz Wi-Fi band. If your computer helps 5 GHz and is connected to the same local area network as the TS3700 series and the router permits communication between devices, then your computer may be able to connect to the 5 GHz Wi-Fi band.
If you have recently updated your Wi-Fi name, password, or router, please re-connect the printer by following either Canon's Setup Guide or the Canon Print App.
If you have a weak wireless signal, you may want to move the printer closer to the router for a short period of time. You may also find that disconnecting from your VPN allows you to connect to other local devices.

1. In Windows 10, go to "Settings," then select "Bluetooth & other devices," then select "Printers & scanners".
2. Select your Canon printer and open its print queue.
3. Cancel stuck or failed jobs.
4. In case there is a printer menu provided by the Queue, verify that neither "Pause Printing" nor "Use Printer Offline" is selected.