📎 AI Summary:
The thread discusses a user’s attempt to replace their Acer 7540 laptop’s WLAN card with a Sierra Wireless MC5720 WWAN device. The user encounters issues with device recognition and BSOD errors when installing Windows 7 drivers, despite the device working on another laptop. A responder suggests uninstalling the existing Atheros drivers to avoid potential driver conflicts, implying that driver conflicts or port issues may be causing the problem.
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nickb

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Mar 6, 2009
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Thread Author #1
I have an Acer 7540 laptop, I have a WLAN Atheros b/g/n mini card installed. I wanted to change it to a Sierra Wireless MC5720 WWAN device. I installed it on my laptop and the Device manager could not find the device. Now I tried the MC5720 on another laptop so I know its not "dead" . Windows 7 has the drivers for the device already but when I install them I get a BSOD for the driver file of the device. I do have a Sierra wireless 598U installed that uses the same driver file for the MC5720 but I never had the 2 devices installed at the same time.

Any suggestions?
 

Solution
CommonTater
Did you try uninstalling the Atheros drivers first?

It may be a port conflict if the two adaptors are using the same connections to the machine.
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CommonTater

CommonTater

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Jul 21, 2010
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#2
Did you try uninstalling the Atheros drivers first?

It may be a port conflict if the two adaptors are using the same connections to the machine.
 

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