Question about Dell Latitude C400 Notebook

1 Answer

Ethernet port not "active"

My Dell Latitude C400 LAn/Ethernet port doesn't appear to be functioning. There are no link /data lights when an Ethernet cable is plugged in. When cable is unplugged it does show that a network cable is unplugged message. I checked the device manager and it shows that the 3Com 3C920( 3C905C-TX) is working properly. I even installed fresh drivers for the 3Com 3C920( 3C905C-TX) . Still not picking up connection.
Can it be a bad LAN/Ethernet port??
Can I get a cheap mini wireless card to bypass LAN/Ethernet??

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  • 8 more comments 
  • arosest1 Apr 22, 2009

    Yes, I have tried a brand spankin new LAN cable . Still nothing.

    I will try the BIOS option later. Is it listed under "On board LAN"?

  • arosest1 Apr 27, 2009

    Hi Jerry and thanks for the help. LAN is dead. LAN is enabled in BIOS. Strange that when LAN is unplugged system notices LAN cable is unplugged.Then...when I tried the phone line connection I received a SM56 codec error. I fixed that with a DL of a new driver but it still can not dial out. Seems COM port 3 is closed and I can not query modem. I tried to assign another COM port but same . Is there a PCI slot card that will work with my PC and then I can connect a phone line and dial my ISP?

  • arosest1 Apr 27, 2009

    Sorry, I may have mis spoken. I DL drivers for the SM56 speakerphone modem , NOT the NIC. Couldn't find SM56 drivers , Motorola shows no longer available,but did find compatible drivers and I now no longer receive the SM56 incompatible codec error.Now I get a COM port error when quering modem. As for the NIC....all appears to be OK in device manager and BIOS. Shows LAN cable unplugged and balloon message goes away when LAN cable plugged in but no link lights on port, can't ping...shows "media not connected" error. This was given to me by a friend that bought a new one. He stated it did work but not sure when the last time was.

  • arosest1 Apr 27, 2009

    Hi again,



    I did check Dell and put in the service tag and found appropriate modem and DL those drivers, uninstalled/reinstalled...rebooted and new HW wizaed came up and installed modem....NOT the SM56 but off hand I don't have the exact modem info in front of me. Installed without issue but when I try to dial out I get a COM error....that the COMport 3 is closed. Tried to assign to a higher COM port but same. IT WILL NOT DIAL OUT. I believe the LAN could be shot and I am not replacing a MB for a Dell D400. Not worth it. A PCMIA card with phone connection is cheapest..........correct??

  • arosest1 Apr 27, 2009

    Jeryflores,



    Thanks for all your help. I will be sure to use this site again in the future should I run into any technical issues that are beyond my grasp. Hopefully you'll be the one answering !



    Kevin

  • Jerry May 11, 2010

    You can get both a PCMCIA card for both modem and ethernet. I'm not sure which route you're going to go to connect to the internet, but obviously if you have high speed internet, your best bet would be to do a PCMCIA ethernet card. Try this website, I use them almost exclusively to price, etc:



    http://search.pricewatch.com/search?q=PC...=



    You can get a PCMCIA for a gig connection for around $15.00, the Netgear GA511 would be a decent one. Unless your router is a specific brand, I would also stick to same brand for an easier configuration. Good luck and let me know how it turns out.

  • Jerry May 11, 2010

    One thing I'm confused about, you mention you have SM56 Speakerphone modem, however, the drivers listed that came shipped for that particular laptop, don't show that model modem. Look, I'm sure you already did:



    http://support.dell.com/support/download...=



    Possible to uninstall and install one of the supported modems on that page? Even if the drivers is a bit older.

  • Jerry May 11, 2010

    There are no internal pci slots like you would have on a desktop. However, your system does have a PCMCIA slot. The dell website lists the following devices as being compatible with your system:



    http://support.dell.com/support/systemsi...



    You said you had installed fresh drivers for your onboard NIC, however, the drivers I find for your system, the lastest listed is 2003. Can you give me the version of the driver and date? I'd like to look elsewhere for the drivers. A lot of times, drives dont' have to come specifically from the hardware vendor. It is strange how your onboard NIC is behaving. Another thing I never asked is, has the NIC ever worked? Or is this a more recent problem?

  • Jerry May 11, 2010

    Yes, it is found under "On-board LAN." But it doesn't sound like that's your problem. You probably would see it in "Device Manager" disabled. Your next option maybe as you said, purchasing a wireless adapter. I would stick to the same brand as your wireless router. If you need help deciphering which type, let me know. Pretty much, all of the major brands are good, but again, for simplicity, stick with the same brand as router. Also, if you have a G router, ensure your wireless adapter also supports G or higher.

  • Jerry May 11, 2010

    Have you tried using a different ethernet cable? Sometimes cables do go/are bad.

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  • Dell Master
  • 4,806 Answers

Hi there.
Restart the PC and go into the bios to make sure the on-board LAN is enabled, if it is try as jery says and try another ethernet cable.

Post back please and good luck

Posted on Apr 21, 2009

  • Lee Hodgson
    Lee Hodgson Apr 22, 2009

    yes it will be listed under on-board LAN

    good luck


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