How to Get My Canon imageCLASS LBP6230dw Printer Back Online?
Is your Canon printer showing “Offline” on the display? Has it stopped working and responding to your commands? When a printer goes offline, it means it’s no longer connected to your device, and this can happen for several reasons. Sometimes, the Wi-Fi light on the printer may turn off, which indicates a loss of wireless connectivity. In every case, the result is the same - the printer doesn’t print. It may receive a command but fail to produce any output.
Source: https://sites.google.com/view/connectprintertowifi565/blogs/canon/how-to-get-my-canon-imageclass-lbp6230dw-printer-back-online