When I face this, I carry a new router and client card with me. I do try updating the firmware in the devices, but what most can't do is swap out the hardware to find out what part it is.
Another issue is that some will accept a driver update from Microsoft. We get to remove that.
Best of luck,
I have read several threads and some sound a lot like the problem that I am having. But I have tried all of that and nothing works. I recently just bought a Compaq Presario R3000 which has a WAN built in. I have a WRT54GS Lynksis Router with Speedbooster and a Dell Inspiron Desktop hooked up to cable (Optimum Online) service.
One day, out of nowhere, my laptop connection to the internet just shut off by itself. I have literally tried everything. I have unplugged router, modem, and vice-a-versa, have gone and tried changing IP addresses, enabled DHCP, gone into the command prompt to see what is really going on, have gone into the registry, gone into the LAN IP Protocol. I have been on the phone with a friend who has an MA in Information Technology. And stil nothing..........I have gone into the Lynksis site and refreshed and renewed the settings.
I have also gone on to several, I mean several, thread forums and tried to see if other people have had similar problems. Could someone please help. It seems that I can send out packets but I am not able to receive them. So, in other words, the laptop is picking up the router connection at about 54 bps but still no internet connection. Within the command prompt, it does say that the media is disconnected, but I dont know how to turn it on. Someone help.!!!!!!!!!! Thanks.