I'm sorry about the issue. What's the model of your router?
Do you have windows xp, vista, or 7, or 8, 10, or mac computer?
On the printer's screen, when you go to the MENU -> WLAN setup -> (if prompted, to press WPS button, just press OK button / if error is show, press OK again) -> Change setup method if shown -> Standard Setup, then select / connect to your wi-fi / wireless network name, then what happens? Is there any error or message?
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