Symptoms

Some Dell Mobile Broadband (WWAN) modules are not detected by the operating systems device manager after the system has gone through the re-imaging process. (Such as with Microsoft's SCCM.) There is no version of the Windows operating system that this does not occur on.Note: Be aware that this is one of the few occasions where a two-way swap of a known working Dell WWAN module does not prove that the original module is faulty. (Although swapping in a working module from a system that has not been imaged resolves the issue temporarily.) If you have re-imaged your personal computer with any of the Windows Operating Systems and once the system has restarted the Dell WWAN card is not detected, check the following: If an unknown device shows under Communication Devices or Ports with a yellow bang in Device Manager, carry out the following Solution Steps. If it does not appear in the Device Manager under Networks after you have followed the Solution Steps, then contact Dell Support for further help in resolving your issue.

Cause

Cause information is not available.

Resolution

The following Solution Steps take you through identifying the correct driver for your module, re-installing that driver, and completing the firmware update that is part of that driver re-install. These steps deal with a module that is not detected after the system was imaged at any point: Open the Internet browser of your choice and go to the Dell Support Site. Enter your Service Tag or Express Service Code from the label on your system to bring up information specific to how your system shipped from Dell. You can also choose your System Type from the products listed, however this does not narrow the possible choices down to those that shipped with your system. Select Drivers & Downloads from the choices on the product page. If you have entered your Service Tag it shows you drivers available for the hardware that shipped with the system, ensure that the correct operating system is selected before going to the Modem and Communications section and selecting the Dell WWAN driver for download. If you chose a Product Type instead, ensure that the correct operating system is chosen and then go to the Modem and Communications section and choose the correct Dell WWAN driver for your system from all the drivers listed in that section. At this point, you can decide to have the driver install automatically or save it to your hard disk drive (HDD) and extract and run the update from your HDD. This has been proven to resolve your issue, however if the fault continues contact Dell Technical Support for further help. Note: If you are looking to prevent this from happening in the first place, rather than repairing a module that is not detected once it is failed. You should look to insert a pause after the WWAN installation. This is within the SCCM or imaging software's task sequence scheduler. This stops the issue from occurring. Part of the driver reinstall is a firmware update that loads after 30 seconds of starting the driver update and takes about 1 minute to complete. The system rebooting in the middle of this update is the root cause of why these modules go wrong. Stopping the firmware before it is completed corrupts the module firmware and means that the module can no longer communicate with the Operating System.

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