Hi,
If you have more than 1 wireless router, range extender, timecapsule, etc; turn them all off, keep only one on and connect the printer and the computers to that router.
If this works and you have more than one device for your wireless network, then it is a routing issue
If you only have one router, turn it off then back on.
That is in the case that the printer wireless light is solid on and the computer connected to the network.
I hope this helps.
Best regards
Mike G