Dell Precision M90 - Manual (Page 103)

If you experience other memory problems —
l Reseat the memory modules to ensure that your computer is successfully communicating with the memory (see Memory ).
l Ensure that you are following the memory installation guidelines. See Memory .
l Run the Dell Diagnostics. See Dell Diagnostics .
Network Problems
Fill out the Diagnostics Checklist (see Diagnostics Checklist ) as you complete these checks.
General
Check the network cable connector — Ensure that the network cable is firmly inserted into both the network connector on the back of the computer and the
network jack.
Check the network lights on the network connector — No light indicates that no network communication exists. Replace the network cable.
Restart the computer and log on to the network again.
Check your network settings — Contact your network administrator or the person who set up your network to verify that your network settings are correct
and that the network is functioning.
Mobile Broadband Network
Cannot connect — The Dell Mobile Broadband Card must be activated on the network in order to connect. Position the mouse over the icon in the
notification area to read the status of the connection. If the status indicates the mobile broadband card is not activated, see Activate your Mobile Broadband
card for more information. If problems persist, contact your Mobile Broadband service carrier for details on your plan.
Check your Mobile Broadband network service — Contact your Mobile Broadband service carrier to verify coverage plan and supported services.
Check the status in the Dell Mobile Broadband Card Utility — Click the icon in the taskbar to launch the utility. Check the status in the main window:
l No card detected – Restart the computer and launch the utility again.
l Wireless Disabled – Ensure that the Dell Wi-Fi Catcher™ switch is in the "on" position. Additionally, right-click the icon and ensure that the switch
is enabled.
l Searching – The Dell Mobile Broadband Card Utility has not yet located a Mobile Broadband network. If the searching state persists, ensure that the
signal strength is adequate.
l No service – The Dell Mobile Broadband Card Utility did not locate a Mobile Broadband network. Ensure that the signal strength is adequate. Restart
the Dell wireless utility or contact your Mobile Broadband network provider.
l Check your WWAN service – Contact your Mobile Broadband network service provider to verify coverage plan and supported services.
Activate your Mobile Broadband card — Before you connect to the Internet, you must activate the Mobile Broadband service through your cellular service
provider. For instructions and for additional information about using the Dell Mobile Broadband Card Utility, see the user's guide available through the
Windows Help and Support Center. To access the Help and Support Center, see
Windows Help and Support Center . The user's guide is also available on the
Dell Support website at support.dell.com and on the CD included with your Mobile Broadband card if you purchased the card separately from your computer.
Power Problems
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: The Dell Mobile Broadband Card Utility user's guide is located under Help and Support. You can also download the user's guide from
support.dell.com.
NOTE: The icon appears in the notification area if the computer has a Dell Mobile Broadband card installed. Double-click the icon to launch the utility.