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Windows 7: Broadcom 4321 WLAN Not Detected


08 Nov 2009   #1
romaonly

Windows 7 Ultimate x86
 
 
Broadcom 4321 WLAN Not Detected

The HP forum is worthless, so I thought I'd give this a try.

I've installed Windows 7 Ultimate x86 on my machine (hp tx2110us). Been able to get pretty much everything working, but the Broadcom WLAN isn't consistent. Sometimes when I reboot it disappears! Can't see it in Device Manager at all, like it's not even connected!

When I installed Windows 7 initially it detected the card during setup on first boot and I had no problem connecting to my network.

At first I thought it was a conflict as it seemed to happen when I installed other drivers. So I wiped the HD, did a CLEAN install of 7, got it working, installed the Windows Update for Broadcom, rebooted, AND IT DISAPPEARED. So no other drivers have been installed other than stock Windows and IT STILL DISAPPEARED. I rebooted into safe mode with networking to see if maybe it would appear, got nothing. So I rebooted and when I logged in, IT CAME BACK! So I rebooted again without changing ANYTHING, and guess what? NO WIRELESS CARD. Not in the device manager, not listed under Network, not listed under unknown, NOT LISTED. Win 7 just seems to see it whenever it feels like it!

Win7 probably detects it about 1 time out of 25 reboots.

I've tried installing the suggested HP driver for it, but it has zero effect. How can I troubleshoot a device that doesn't appear in the device manager?!?!

Does anyone have a clue?

Edit: Left out the fact that I downgraded to WinXP to test the card and make sure it was functional, in 20 reboots it worked 20 of 20 times, so the hardware is definitely good.


My System SpecsSystem Spec
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08 Nov 2009   #2
torrentg

7600.20510 x86
 
 

Quote   Quote: Originally Posted by romaonly View Post
How can I troubleshoot a device that doesn't appear in the device manager?!?!
By clicking on any device or section at all first, then clicking action, scan for hardware change.

If/when it shows up, install the driver again by pointing to the .inf of the installer.

Right click on device. Update driver software. Browse. Let me pick. Have disk. Browse. Find the .inf and double click on it. Hit ok.
My System SpecsSystem Spec
08 Nov 2009   #3
romaonly

Windows 7 Ultimate x86
 
 

Thanks torrentg,

but...

I am at the point now where I absolutely cannot get the Broadcom to appear at all.

No matter how many times I reboot.

No matter how many times I scan for hardware changes.

It won't come up.

Any other ideas?
My System SpecsSystem Spec
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08 Nov 2009   #4
torrentg

7600.20510 x86
 
 

Yes. Pull the card out and get a can of compressed air. Spray compressed air on the PCI socket on the motherboard. Use a Q-Tip or something soft like a paper towel to gently clean the connections on the card.

If you don't have compressed air, you can use a vacuum on the slot if you're careful about it. Follow suggestions for grounding etc....by touching chassis.

Point is, get it all as clean as possible and try again. Try another slot if necessary.

Make sure Plug & Play OS is set to yes in the bios. Update chipset drivers from motherboard manufacturer.
My System SpecsSystem Spec
09 Nov 2009   #5
romaonly

Windows 7 Ultimate x86
 
 
Solution

Solution Deleted: 24 hours later my Broadcom 4321 has disappeared again. Can't seem to find a permanent solution.
My System SpecsSystem Spec
09 Nov 2009   #6
torrentg

7600.20510 x86
 
 

Quote   Quote: Originally Posted by romaonly View Post
ANY OS install DO IT IN THE FREEZER.
Very bad advice! That can easily damage hardware from condensation process. Stories abound.

Glad it didn't and things worked out for you though.
My System SpecsSystem Spec
09 Nov 2009   #7
romaonly

Windows 7 Ultimate x86
 
 

Unfortunately, this is the only way to get setup complete on this particular machine, you could set it on a bag of ice, but you still run the risk of condensation with the bag sweating.

Thank you for pointing that out, I added a warning to my solution post.
My System SpecsSystem Spec
10 Nov 2009   #8
romaonly

Windows 7 Ultimate x86
 
 

Still can't seem to get it working. Had it going for about 24 hours, but now it's disappeared yet again. Can't get it to show up with reboots, even tried the Windows 7 upgrade that brought it back before and had no luck.
My System SpecsSystem Spec
26 Nov 2009   #9
romaonly

Windows 7 Ultimate x86
 
 

Odd. I ordered a D-Link USB WLAN from eBay, and got it in the mail Monday. Plugged it in, got it working, and then... The first time I rebooted with it plugged in, my Broadcom re-appeared.

It happened again today. Funny thing is, the Broadcom has not worked 1 single time since I ordered the D-Link, that was 2 weeks ago.
My System SpecsSystem Spec
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 Broadcom 4321 WLAN Not Detected




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