Here is a copy of my reply to your previous thread.
How many total systems are on the network, including the 15 new ones. Many routers have a max user limit and maybe you have surpassed it. I know some Linksys products that cap out at 33 users or less.
Now a less obscure possibility.
What is the DHCP Range set to in your Router? If the dhcp pool range is set to allow only from say 192.168.1.100 to 192.168.1.104 then you would only get the first 5 computers onto the network in a network of 15 computers.
You can check to see if your computers are drawing a DHCP IP Address from the router by going to Start Button->Run and typing CMD in the dialog box and clicking OK or pressing enter. This will open up a Command Prompt Window. At the flashing command prompt type the following command: ipconfig /all
and then press enter. Are all your computers pulling an IP Address in the same range? Ie: 192.168.1.nnn where nnn has to be a unique number for each computer?
Sorry if I'm stating the obvious here... I just don't know where you are at in the troubleshooting process.
total 17 sysems here.Only 4 specific system can acces the internet. working system ip is in range of 188.8.131.52.& sub net is 255.255.255.0.
but other system take ip like 169.x .& sub net is 255.255.0.0.& shows limited connectivity.all systems are just installed,with a motherboard of intel dg41rq.have any chance of issue with mb ,please give more suggtn..I am waiting for u
Motherboard issue is possible with new computers of course, but lets not assume that just yet.
A 169.x.x.x ip address range is a default range that gets assigned when the computer can not get an ip address from the DHCP Server (Router). So let's eliminate the cabling as the issue first. To be absolutely sure it is not a cable issue, can you take one of the system units that is not working to the location of one of the four that are and connect it to that known good cable and see if your get a proper connection?
Yes , I already checked this ie with known working cable, & found system not working .I also checked whole sysytem with static ip , in which all systems are working.I am highly suffering with this problem, please assist me !
If you can get them all to work with a static IP address then the most likely issue is your network router or Server. Which device is used as your DHCP Server? The router or the Server (if their is one). Also, what make and model of router? What Server Operating system if a Server provides DHCP?