No DNS resolution on wireless

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Had an odd one today at work.
Full internet access with ethernet cable, but wireless doesn't do DNS resolution.
ipconfig shows same DNS server (default gateway).
Can ping by IP address on wireless, but not by domain name.
Sometimes IE works but ping by domain name still fails.
Another notebook on the premises has no problems.

I think it's a flaky wireless card but any ideas on what/how to troubleshoot next are welcome.

 

Yeah, can ping the internet no problem with IP address, just domain name doesn't work.

I should also add, I've tried different drivers and the cards manufacturers app rather than letting windows take control.
OS is XP iirc.
Edit: It is XP, I used Start>Run to access CMD

 

Had a very similar problem recently with a couple of Acer laptops with Intel wireless cards. They were obtaining IP's ok, but won't ping the DHCP server, Default Gateway etc.. but could get to the Internet.

After swapping a known good wireless wireless card into the laptop it was totally fine. This was the case with two different laptops. So we are having the cards swapped out under warranty. It's not happened yet, but it should be covered as they both have platinum Acer warranties.

 

That now sways me firmly into the hardware problem camp. I'd never seen this behaviour before, but I take the Sherlock Holmes attitude to problems, eliminate the impossible...
Did these laptops connect OK through wire?

 

Totally fine via the wired connection.

Drivers yes, firmware no. It's probably one of the few things I didn't try.