If the router is set to WEP, that happens a lot. I no longer will discuss why that is.
Try WPA or WPA2 next.
I'm running a HP Pavilion g6 laptop
Linksys WRT54GS router
Windstream speedstream modem
Lately my laptop won't go online with wifi. It says, "no internet access." This is confusing, because I can hard wire it to my modem and it works okay, so it is not the ISP.
But, we have another computer and sometimes it will work on there, and we have a Roku and it works on there sometimes. So, this is not consistant.
Today I went to Linksys and downloaded the latest firmware update and installed that. I still have the same problem. --- "no internet access."
Thanks, I'm going bananas!