You’ll want to look that up for yours. Basically, you log into your router, find your 2.4 GHz settings, pick a channel. You’re probably set to “Auto.” Pick a channel. I suggest 1. See if it works. If that doesn’t work, since you were on Auto, try 11 afterwards and see if that works. Feel free to try other channels. I suggest 6 next. Beyond that, take your pick. But if, after 3 channels, it’s not working, you’ve pretty clearly got some other issue happening.