My computer will connect to a network, but it will not transmit any information. Why?
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Ok, first check your cabling(are the cables plugged into place? Are the connector ok?).Next check your computer's IP settings in order to make sure that youre computers are in the same network class, but each one has a different IP address. After that try to ping the other computers (Start-\n>run->cmd and the command is ping ip_address  - eg.: ping 192.168.8.10). If all works well make sure your computers ar in the same workgroup
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You should specify which model router you have, and what type of computer and operation system software - laptop or desktop, Windows version or Mac OS.\n\nAlso mention what setup you were using to connect when it used to work on wireless.\n\nA telephone modem and Ethernet LAN connection would not generally be a wireless capable device in your computer.  It could be that the icon controlling your WIFI hardware is clicked to the OFF position.  Check each item in the lower right screen system tray using right-click of the mouse.
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If you're a Windows user (XP preferably), go to Windows Update.  It should be able to detect your ethernet port and provide a recent driver.
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hello ! it's about the router ... if it is a cheap one with basic NAT, you need to upgrade to a router with enhanced NAT capabilities. Sorry, there is no other solution ...
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Hi. It sounds like your network card or modem card may be at fault. Can you try removing it and replacing it. If not, go to your control panel, system, hardware manager and uninstall the device in software. Reboot and see if that works. Good luck.
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TURN THE FIREWALL OFF! and enable file sharing, that's it.\nyou can check by pinging the computers.
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Check the modem to see if there are still any DHCP address left for it to hand out. Check if the DHCP server can hand out IP addresses to the wired computers, not just to the wireless computers.\nCheck if you can have both a wireless and a wired connection at the same time (some modems will only allow one type of connection). Check if your network card is installed properly. Check if the cable is still good, swap it with a different cable if you can.
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Couple of possibilities, bad NIC, bad patch cable, or bad router. \n\nPacket loss most often occurs believe or not from a bad patch cable.
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Check the router is on, and connected to the internet. If you assigned a fixed IP to your machine then it is probably not connecting to the router - for example addresses like 169.... are assigned by XP to the system when it can not find the DHCP server (like the router)
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The other computer must be on and functioning properly so it is "live" on the network. It has to be sending a signal.
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What kind of router?   Your  router should have it's own DHCP server built into it's firmware which will assign a private IP number to each of it's ports.  Use the routers web interface [probably at 192.168.1.1 or 192.168.0.1] to make sure DHCP is turned on. \n\nAfter that, at the computer not getting connected, ping 127.0.0.1 to make sure the NIC is working.  Still dead?  Swap cables around to test them...
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On your laptop? Just click on network connections and search for a network and then select one and connect. (It will not allow it if it has been password enabled)
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Go to Preferences and check to see if your Connections are correct.  For it to work (if you don't have a firewall, or use proxys) your connection should be "No Proxys"  If you have a firewall use the "Firewall, No Proxys."  That might be your problem.
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If you're on linux using a bash shell, you could use nmap.\n\nIf you're on windows, download a network scanner and use that.
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Make sure that you have a ROUTER and not a Hub. That could possibly be your problem.
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Do use a firewall? If you do, try disabling it or changing its settings and see if if your programs work then.
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if you're using XP, try resetting the tcp/ip. if it still does not work, you might have to do a regedit. call your ISP or pc manufacturer technical support,they can help you with that.