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One Laptop can't find home WiFi, All other laptops can

Discussion in 'Networking' started by dertzi, Mar 29, 2013.

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  1. dertzi

    dertzi Thread Starter

    Joined:
    Mar 29, 2013
    Messages:
    1
    Hi all!

    I'm having a bit of a trouble with my eMachines netbook M250. I was going to contact their customer support, but for some reason their services kept telling me that "That serial number is not in our database".
    I'm hoping you guys can help me!

    I have 3 laptops and a desktop PC. Two of my laptops are connected through wireless and my Desktop PC through a cable. Now this small isnt finding the wireless network my other computer are connected to. It has found all other wireless networks, tons of them (neighbors, city wifi, etc), but just cant find my home wifi.

    I have reinstalled windows XP and reinstalled the wireless drivers. Also checked that they're the newest out there.

    EDIT: I found a solution to this problem. Once I changed the Channel Selection settings from my router from Auto to 1 (out of 13), My laptop could find the wifi!
    After changing it back to "Auto" it loses the connection to the wifi. The "Auto" selection chooses channel 13, which is the channel with the least noise, according to the channel scanner of the router.
    Is there any cause to worry that I have chosen Channel 1? Why cant my laptop find the wifi when the router is set to Channel 13?

    Thanks,
    dertzi
     
  2. etaf

    etaf Moderator

    Joined:
    Oct 2, 2003
    Messages:
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    First Name:
    Wayne
    the US are only allowed to use channel 1 to 11 and some machines sold still have that restriction - Europe can use 1-13 - hence the router is switching to 13

    there maybe a setting in the wireless adapter properties to allow you to use channels 12 & 13 (Japan are allowed to use 14)

    goto device manager and network adapters and right click on the adapter - choose properties and see if anything there helps

    Lets see the wireless networks and channels in use - use xirrus and post a screen shot

    channels 1, 6 and 11 are the most common used, as they do not overlap - so wee need to look at signals greater than -80 and see what channels are in use around you

    ------------------------------------------------------------------------
    Run Xirrus Wi-Fi Inspector
    Download and install

    If you cannot access the internet with this PC, then you will need to copy the program across to the faulty PC
    Save the file to a USB flash drive or other removable media. Plug it into the working computer with internet access and copy the file and install the program.
    You will now need to take a screen shot and copy that back to the working PC and attach the screen shot in a reply on the forum here.

    If you do not have another PC - do you have a phone connected to the internet - can you photograph the result and post the image in a reply

    http://www.xirrus.com/Products/Wi-Fi-Inspector.aspx
    Direct link to the program is here http://info.xirrus.com/Wi-FiInspectorConfirmation.html

    {If the above link does not work heres another link http://www.pcworld.com/downloads/file_download/fid,77196-order,4/download.html}

    Then run and install the program - on a wireless enabled PC/Laptop
    if you get an error - You need will need to have NET Framework installed for the WiFi Inspector to function.
    On windows 8 - (i do not have windows 8) but, it would appear that, When you first try to run, you may get a message that .net framework is needed, and included in that message is a link to download/install.

    Run the program

    A user guide is available here http://www.xirrus.com/cdn/pdf/Xirrus-Wi-Fi-inspectorguide-1-2-1-RevB-6.aspx

    post a screen shot of the program running.
    if there are a lot of networks showing can you click on "networks" top lefthand area - so we can see all the network information.

    post which SSID name is yours, its located in the list, under network "Adapter Name" (1st column)


    Note:
    For a reliable (or robust as the Xirrus user guide says) wireless connection you need a signal of about -70 dBm or better. "A desirable signal level for a robust Wi-Fi connection will be green".
    note: the signal level is a negative number, so for example -88 is worst and -40 is better

    To post a screen shot of the active window.
    Windows XP
    Hold the Alt key and press the PrtScn key. Open the Windows PAINT application (Start> All Programs> Accessories> Paint) and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file.

    Vista or Windows 7
    you can use the "snipping tool" which is found in Start> All programs> Accessories> Snipping Tool
    http://www.bleepingcomputer.com/tutorials/how-to-use-the-windows-snipping-tool/

    Windows 8
    you can use the snipping tool > Open Snipping Tool (From the Windows 8 Start Screen, type "snip" and press enter.
    >Press the Esc. key.
    >go back to your Windows 8 start screen - Swipe from left or press Window Button
    >Press Ctrl+PrntScr button to use Snipping Tool
    see here
    http://www.pcadvisor.co.uk/opinion/windows/3415854/how-take-screenshot-in-windows-8/
    http://www.pcadvisor.co.uk/how-to/windows/3405830/how-take-screenshot-in-windows-8/


    To upload the screen shot to the forum, open the full reply window ("Go Advanced" button) and use the Manage Attachments button to upload it here.
    Full details are available here http://library.techguy.org/wiki/TSG_Posting_a_Screenshot
     
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