HPE-475a wireless card not detecting networks

For the last few months, every now and again, my computer would start up but be unable to detect any wireless networks. It seemed that simply shutting it back down for an hour or so would magically resolve it. Some research at the time suggested that it was unable to detect a driver for some reason.
However, today, several hours of the computer being off has not resolved the issue, and the device manager suggests that the card is working fine, without any driver troubles. Perhaps I am looking at the wrong thing.
I have been able to connect using an old wireless dongle, but I don't want that to be the permanent solution.
What can I do to better diagnose and resolve the issue? I've searched a bit but couldn't find anything which seemed specific to this situation.
Product name: HPE-475a
Product number: BU082AA#ABG
Operating system: Windows 7 Home Premium Service Pack 1
Error messages: None.
Recent changes: None.
Troubleshooting performed: Attempted to "Diagnose" through Network Connections. It suggested to check the router. The router is fine, multiple other devices are able to connect. Diagnostics then says it cannot resolve the connectivity issue.
Thanks in advance!
- Phil.
This question was solved.
View Solution.

Hi,
If WIFI was working fine using the current router then the mixed mode setting is not the problem.
If Device Manager shows no errors and you cannot connect using wireless then the WIFI adapter card is, most likely, the problem.
Good to hear you have an extended warranty.
Contact HP Support.
Jaco
Errare humanum est.

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    I've opened the computer up to ensure that the airport extreme card is seated properly as well, and that the antenna cable is secured properly.
    Any ideas as to what the issue is? Should I look into replacing the AirPort Extreme card?

    Got no answer on my original post, so I went ahead with ordering a replacement AirPort card on eBay (item #130487488014). Once installed, the iMac was able to detect and connect to networks normally... but was still unable to load any web pages. I tried on secured and unsecured networks as I did previously, and plugging directly into the router and into my Macbook Pro via firewire, with the same results as before. Safari loads pages when connected with an ethernet or firewire cable, but will not load pages on WiFi alone. I can attempt to access a router setup page via WiFi, and am prompted for a username/password, but the page itself never manages to load.
    Any clues as to what may be going on here?!

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