TechSpot

Can't connect to LAN

By anonymeX
Apr 22, 2008
  1. I have a Toshiba Satelite A105 and up until this weekend, the lan cable and the computer were working fine. Then, i turned off the computer for the weekend and now the internet doesn't even connect. In fact, i don't even see the lan connection anymore. I see the wireless and the 1394 but not the lan anymore. I've restarted my laptop many times and sometimes if i'm lucky the lan will be there but not connected even if the cable is connected. What am i supposed to do? Help please.!!!
     
  2. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Start --> Run--> CMD

    Type each line and then press enter

    ipconfig /release
    ipconfig /flushdns
    ipconfig /registerdns
    ipconfig /renew
    net stop "DNS Client"
    net start "DNS Client"

    Try Lan again (or Internet)

    Also this thread should have been posted in Security and the Web forum (but that's ok)
     
  3. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    Thank you, but when i tried it. For the "release", it said that it wouldn't work when the media is disconnected. But the cord was connected.
     
  4. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Go to your Network connections folder and enable the network icon.

    Start-->AllPrograms-->Accessories-->Communications-->Network Connections

    The Network Connections window will then open

    One of those connections is probably disabled (the one that you use)
    Just right click on your one (or all of them individually) and select Enable

    Try Lan or Internet again
    If you were able to Enable your network connection, you may need to restart or repair the network connection (again right click on the connection select Repair)

    Did it work now?
     
  5. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    i understand what you're saying but i've tried enabling and disabling and re-enabling my local area connection. But nothing has worked. In fact, sometimes the lan connection is visible in the network connections window, then it's gone without me touching anything or restarting anything. I think the lan adapter may be corrupted but i dont know how to fix it.
     
  6. jobeard

    jobeard TS Ambassador Posts: 13,450   +324

    it's more likely that you have multiple connections and they are getting the same
    ip address.

    Be sure you ONLY use DHCP and no static addresses.
     
  7. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    but i've been using my laptop for at least a year and it has been working fine. Lately before the windows xp window shows up, a black screen comes up saying the lan adapter may be corrupted or not configured.
     
  8. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    It may be a matter of re-installing your network driver

    Please put your System Specs in your Profile

    If you have a proprietory computer like Dell; HP; Acer etc, please manually write this in the mobo field (ie Dell Dimension 3100 - as an example)
    .
     
  9. k.jacko

    k.jacko TS Rookie Posts: 743

    It sometimes is as simple as deleting your nic from device manager and rebooting. Let windows pick up the drivers for it again and go from there.
     
  10. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    sometimes i can't even find the network adapter when i look under the device manager. I would try uninstalling it but it doesnt even show up, and i've been trying for two days.
     
  11. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

     
  12. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    i downloaded the network driver and i guess i extracted it but i don't really know what to do next? Do i put it somewhere? The lan adapter is not in the device listing so i don't know what to do, all there is is the 1394 and Intel pro wireless network connection.
     
  13. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Go to CMOS and enable the LAN there

    CMOS:
    On starting your computer, you should see a quick prompt to go to CMOS (or Setup) It is usually hit DEL or F2 or some other key.

    Once in CMOS look around on all the settings, until you find Network or LAN, confirm it is Enabled

    Save and Exit

    In Windows, go to Device Manager
    Start->Run->devmgmt.msc

    Click on the plus + sign on Network Adapters
    Right click on your Network Adaptor and select update driver
    Point it to the extracted download provided above
     
  14. jobeard

    jobeard TS Ambassador Posts: 13,450   +324

    see this for 1394 info
     
  15. kingair_six

    kingair_six TS Rookie Posts: 20

    I don't know whether this helps or is related, but my toshiba has an issue with the LCD that seems to work just like yours: starts and stops at random during startup?
     
  16. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    Thank you everyone, but it's still not working. One main thing is that i can't locate the network driver, as in it isn't seen. The lan is enabled, but i cant locate the driver thus i cant update it.
     
  17. jobeard

    jobeard TS Ambassador Posts: 13,450   +324

    the device manager does not show any Network Adapters?
     
  18. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    the device manager only shows the wireless network and the 1394. Sometimes the lan network adapter will show up for one second, then disappear again. Moreover, when it shows up, my laptop starts to glitch. For example, the mouse doesnt move fluidly across the screen but will pause for a second before sliding over.
     
  19. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Faulty Lan adaptor, hardware wise.

    Disable the Lan adaptor in CMOS and use USB, test again
     
  20. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    what do you mean by use USB?
     
  21. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Sorry.

    The USB can be connected to most modems (modem driver required)
    This may not help when connecting to a Network hub!

    It just sounds as though you may have a hardware fault on the Lan
     
  22. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    i'm guessing there's nothing i can do. Thank you very much for trying though. There's something else too. Before the windows screen starts up, my laptop usually restarts itself before it gets to the windows screen.
     
  23. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    You never answered if Lan has been disabled in CMOS?

    Regarding Windows consistantly restarting. have you tried Safe Mode only?
    If Safe Mode works. it may be just a faulty driver issue.

    Also you might be able to backup in Safe Mode, and consider a System Restore (to when the Lan actually worked) or possibly even a full re-install of Windows.

    I say this (Re-Install Windows) just to 100% confirm that it is hardware related
     
  24. anonymeX

    anonymeX TS Rookie Topic Starter Posts: 29

    i disabled the lan but then i dont know what else to do. if it is a hardware issue, would the lan still work after i did a system restore? And safe mode doesnt work, usually it would take almost twenty times of me turning on and turning off the laptop before i could reach windows.

    the wireless capability works and i was wondering if, for the time being, i could create a wireless internet through my laptop. But i was reading the instructions for my netgear router and i'm thinking that the lan must be connected, which is a problem. So i was wondering how do i create a wireless connection, if possible. Thank you.
     
  25. jobeard

    jobeard TS Ambassador Posts: 13,450   +324

    with this much trouble, your System Logs should have some good info for us;
    run->eventvwr.msc​
    start with System
    look for Errors, then Warnings. The little document button will copy to the clipboard
    so you can paste as a follow-up.

    Also investigate the Application Log
     
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