Hardware: Dell Precision M4400 Intel X9100, 4GB, Quadro FX1700, 320GB HDD, Intel WIFI 5300 AGN
OS: Vista 32/64, XP32, Win7 32 B7100
Drivers: Variety from default installed to latest avail on intel.com
Routers Used: WRT54G, WRT54G2, WRT600N, AGL802
Wifi security used: NONE, WEP, WPA, WPA2
Issue in short: Wifi connects but no activity
Issue in depth: i5300 will install correctly and then successfully see the list of APs PROset or Windows displays. i5300 will connect and then fail to identify in vista/win7 or assign IP address in XP and defaults to dreaded 169 addy.
What I have tried 1: Reinstall a variety of drivers with and without proset (All drivers install without fail but still cause the same problem)
What I have tried 2: Reseat the half mini pci card and then reseat the 3 ant (Signal strength is still strong and no visible change in issue)
What I have tried 3: Run PROset Disagnostic (Fails at ping test 7 only on every OS but passes 1-6 without issues)
What I have tried 4: Manually assign a working IP address used on another machine and random new ones within pool (Sits there with no excuse or reason as to why theres no connectivity)
What I have tried 5: Bought another i5300 Half mini PCI AGN card thinking I have a junk card (The problem still exists... the EXACT issue is still present!!)
I am not a lucky person by nature however the chance of 2 non functioning cards seem very strange to me. I would rather not have to wait 2 weeks for a non intel branded card to resolve the issue especially since the 5300 is the best wifi card one can buy at the moment. This issue has stumped everyone I know I ask anyone to aid me who would happen to know the issue and th eresolution for it.
You're right. the chances of two cards have the same problem is very unlikely to be the hardware.
Just to rule out the possibility that some OS (mis-)configuration is the problem you could try to load a Linux Live CD and see if it works from there.
I know that ubuntu 9.04 was just released last week so that may have integrated drivers but i also found some threads on the ubuntu forums. Since its a live cd, just reboot to get back to normal windows.