Dell Inspiron 640m - wireless suddenly doesn't work

Networking, Internet, Wireless

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Dell Inspiron 640m - wireless suddenly doesn't work

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Hey!

I have Dell Inspiron 640m and I seem to have a problem with my wireless connection.The WiFi light on my computer went off all of a sudden when I was browsing the Internet and now I can't connect to wireless anymore. Wired connection works just fine but my computer can't find any wireless networks at all though there are plenty around. Fn+F2 only turns Bluetooth on and off, the wifi light stays off all the time. I have never had any problems with my wireless connection before and I haven't changed any settings, although my Vista did update itself the day before (maybe that caused some problems?). When trying to open my Wireless WLAN Card Utility, it first says that 'The wireless network adapter could not be accessed. This application may have diminished the functionality as a result.' The Site Monitor tab says that radio is disabled and when I run the tests in the Diagnostics tab the results of all the tests are 'failed'. I'd be very thankful if anyone knew if there's any way to fix this problem at all. Thanks!

Verified Answer
  • kadri,

     

    Make sure that the wireless adapter is enabled in the BIOS, press F2 at the Dell Screen. Save changes and exit.

     

    You tried to install the drivers, so anything in the device manager that has a yellow exclaimination mark or red x, right click, uninstall.

     

    Restart your computer. The new hardware wizard will install the device/drivers when the computer restarts and the unrestricted account logs in.

     

    Other option is that the wireless card came loose or has failed. Instruction HERE to remove and reinstall the wireless card.

     

     

    Rick

     

     

    #DellRockStar

    What is a Dell Service Tag and how do I locate it? 

     

     

    Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks 

    Welcome to Dell Community!

All Replies
  • kadri,

     

    Places to look to see if the Connection is enabled

     

     

    Rick

    #DellRockStar

    What is a Dell Service Tag and how do I locate it? 

     

     

    Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks 

    Welcome to Dell Community!

  • in BIOS it shows that my wifi connection is enabled and also that Fn+F2 should turn on both wifi and bluetooth, yet when i try this, the combination only enables bluetooth, it used to enable both. in my Windows Mobility Center i cannot even see the wifi connection box like i should and when i check  the Device Manager then under Network Adapters i can see Broadcom and Microsoft ISATAP adapters but i cannot actually see a separate wireless adapter for some reason

  • kadri,

     

    Try powering off the ISP modem/router and your wireless router(if any) for 30 seconds. Power on the ISP modem/router. Wait 15 seconds, then power on the wireless router(if any).

     

    Restart your computer.

     

    Can you connect?

     

    If using Vista/Windows 7 try running Finding System Information REMOVE YOUR PRODUCT ID and post the rest of the information back here.

     

    What do you see in the device manager under network.

     

     

    Rick

    #DellRockStar

    What is a Dell Service Tag and how do I locate it? 

     

     

    Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks 

    Welcome to Dell Community!

  • after powering off my modem and router and restarting the computer i still cannot connect. i've tried that several times. it doesn't find any wifi networks at all, though there are plenty around

    i took a screencap of what i see under my Device Manager:

    i don't know why there's a yellow exclamation mark in front of the Microsoft ISATAP adapter because it says that all my drivers are up to date

    and here's my system information:

    Host Name:                 KADRI-PC

    OS Name:                   Microsoft© Windows Vistat Home Premium

    OS Version:                6.0.6002 Service Pack 2 Build 6002

    OS Manufacturer:           Microsoft Corporation

    OS Configuration:          Standalone Workstation

    OS Build Type:             Multiprocessor Free

    Registered Owner:          Kadri

    Registered Organization:  

    Original Install Date:     1.05.2007, 7:00:26

    System Boot Time:          19.07.2011, 15:12:31

    System Manufacturer:       Dell Inc.

    System Model:              MXC061                          

    System Type:               X86-based PC

    Processor(s):              1 Processor(s) Installed.

                              [01]: x86 Family 6 Model 14 Stepping 12 GenuineIntel ~800 Mhz

    BIOS Version:              Dell Inc. A10, 2.04.2007

    Windows Directory:         C:\Windows

    System Directory:          C:\Windows\system32

    Boot Device:               \Device\HarddiskVolume3

    System Locale:             et;Estonian

    Input Locale:              et;Estonian

    Time Zone:                 (GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius

    Total Physical Memory:     2˙550 MB

    Available Physical Memory: 1˙350 MB

    Page File: Max Size:       5˙338 MB

    Page File: Available:      3˙765 MB

    Page File: In Use:         1˙573 MB

    Page File Location(s):     C:\pagefile.sys

    Domain:                    WORKGROUP

    Logon Server:              \\KADRI-PC

    Hotfix(s):                 370 Hotfix(s) Installed.

    Network Card(s):           1 NIC(s) Installed.

                              [01]: Broadcom 440x 10/100 Integrated Controller

                                    Connection Name: Local Area Connection

                                    DHCP Enabled:    Yes

                                    DHCP Server:     192.168.4.254

                                    IP address(es)

                                    [01]: 192.168.4.139

                                    [02]: fe80::2924:9b77:bde8:7ce0

  • kadri,

     

    Looking at the information, what language is the operating system installed in? I see that you're in another country. Did you try going to Drivers & Downloads click on warranty status and enter your service tag number. Click on origional configuration. There it will tell what wireless adapter you have installed. You can then go back to Drivers & Downloads enter your service tag number. Go there, if using an operating system other than English, click more filt6ers and select the language for the drivers. Then under network you should be able to download and install the drivers for your wireless adapter.

     

    Places to look to see if the Connection is enabled

     

    Also read How to by-pass the Dell Download Manager and use Internet Explorer and download the drivers in your browser.

     

     

    Rick

     

    OS Name:                   Microsoft© Windows Vistat Home Premium
    OS Version:                6.0.6002 Service Pack 2 Build 6002
    OS Manufacturer:           Microsoft Corporation
    System Manufacturer:       Dell Inc.
    System Model:              MXC061                         
    System Type:               X86-based PC
    Processor(s):              1 Processor(s) Installed.
                              [01]: x86 Family 6 Model 14 Stepping 12 GenuineIntel ~800 Mhz
    BIOS Version:              Dell Inc. A10, 2.04.2007
    System Locale:             et;Estonian
    Input Locale:              et;Estonian
    Time Zone:                 (GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
    Network Card(s):           1 NIC(s) Installed.
                              [01]: Broadcom 440x 10/100 Integrated Controller
                                    Connection Name: Local Area Connection
                                    DHCP Enabled:    Yes
                                    DHCP Server:     192.168.4.254
                                    IP address(es)
                                    [01]: 192.168.4.139
                                    [02]: fe80::2924:9b77:bde8:7ce0

    #DellRockStar

    What is a Dell Service Tag and how do I locate it? 

     

     

    Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks 

    Welcome to Dell Community!

  • my operating system is installed in English. i followed the instructions and downloaded all the available drivers under Network. however, i have problems installing the driver meant for Wireless 1390 WLAN MiniCard, i get this error message: 'No compatible hardware found. The software you are attempting to install is not supported on this system. The software will not be installed.' when i checked form under the original configuration, it does say that i should have DELL WIRELESS 1390 802.11B/G 54MBPS MINI

  • kadri,

     

    Make sure that the wireless adapter is enabled in the BIOS, press F2 at the Dell Screen. Save changes and exit.

     

    You tried to install the drivers, so anything in the device manager that has a yellow exclaimination mark or red x, right click, uninstall.

     

    Restart your computer. The new hardware wizard will install the device/drivers when the computer restarts and the unrestricted account logs in.

     

    Other option is that the wireless card came loose or has failed. Instruction HERE to remove and reinstall the wireless card.

     

     

    Rick

     

     

    #DellRockStar

    What is a Dell Service Tag and how do I locate it? 

     

     

    Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks 

    Welcome to Dell Community!

  • it seems like the problem is indeed with my wireless card and not in my computer settings. when checking the status of the WiFi adapter from the BIOS, it says 'none', so it seems that my computer no longer has any connection with the card. i made sure the card has not come loose, so I guess it has simply failed

    Rick, thank you so much for helping me figure out what could be wrong. i very much appreciate it. thank you!

  • kadri,

     

    Sorry I couldn't be of much help. I thought the wireles card in my old computer failed, so I bought a usb adapter. I later found it disabled in the BIOS and enabled it.

     

    Take care,

     

     

    Rick

    #DellRockStar

    What is a Dell Service Tag and how do I locate it? 

     

     

    Original poster, If you have solved your problem, can you please mark the correct thread(s) with your solution. Thanks 

    Welcome to Dell Community!