Lost IP address

My Dads computer does not connect to the internet (this is after 4 years of steady connection to the same ISP). After haveing technitions out to his house to replace cables and modem he was told it was his computer. I have lent him an old computer which connects fine, making me think that its was the original computer (oh yeah, tiny pc, windows xp, cable connection). I've brought his computer home and re-installed the network drivers and the PC works fine at my house when connected to broadband with an ethernet cable, but when the PC goes back to his house its does not connect. He has talked to his ISP, since, and they have told him that they have 'lost' his IP address. Has anyone ever heard of this before. I'm at a loss as it goes way past my understanding!!

Any help Smiley

 

I actually am having the exact same problem. In my case it's a new Dell laptop which was working fine until I connected to the internet via a hotel broadband connection a few days ago. Now that I'm home the computer cannot locate my wifi modem, however it can detect the secured wifi networks coming from other apartments nearby. Clearly the wifi itself is just fine as I'm using it right now to access the internet via my old desktop. Is this a new virus?

 

If you take a PC over to his house will it connect?
Have you rebooted the modem/router?
Was he setup with DHCP or a static ip on his PC?
If the techs came out I assume they got a connection?
Check your TCP/IP settings > right click on the network adapter and select properities, scroll down to TCP/IP and click properities.. is it obtain automatically for IP & DNS??

 

Thanks foogoo, all settings were correct.

I've since installed a NIC and the machine now works perfect.