Monday, March 22, 2010

No Interet & APIPA troubleshooting -169.254.xx.x

APIPA & No Internet troubleshooting steps…

In order to resolve a No Internet problem we must first know the setup.

A few examples are:--

1)Modem only:-- Motorola, Westell, Speedstream & other DSL modems

2)Modem connected with Router:-- Linksys, Netgear, D-Link, 2 Wire, US Robotics & other routers

3)Modem cum Router:-- 2 Wire, Netgear, SpeedTouch, Arris & others follow

No Internet Troubleshooting steps:--


1) First of all perform a complete POWER CYCLE of the entire setup.

This includes unplugging of cables from the ISP devices & rebooting the computer.

2) Check if the computer can PING any website. Remember to run COMMAND PROMPT as administrator in case of Vista & Windows 7

3) Accordingly check if there is any Proxy Server enabled under LAN SETTINGS in Internet Explorer.

If there isn’t any proxy server enabled, Disable/Enable the Network Adapter & the LAN connection under N/W Connections.

4) Now check the IP ADDRESS once again (like 192.168.X.X). Remember that IP ADRESSESS starting with 7X.X.X.X or 6X.X.X.X are connected IP’s.

If the ISP device (modem or router) requires a username & the password, immediately conference the call with the ISP.

5) If no IP is obtained, do an IPCONFIG RELEASE/RENEW so that the device can retain its IP. Also remember to restart the DHCP service under SERVICES.MSC

Remember to reboot the computer after restarting the computer. Also check for any Forced IP’s under properties of the LAN connections icon.

5) If you still cannot get an IP, immediately uninstall the network adapter. Still no IP, RESET WINSOCK & rename the HOST file.

The HOST file can be found in C:\Windows\System32\Drivers\etc.

6)After all this, also try to create new user account.

APIPA troubleshooting -169.254.xx.x


1) First of all perform a complete POWER CYCLE of the entire setup.

This includes unplugging of cables & swapping the ends of the Ethernet cable from the ISP devices & rebooting the computer.

2) Perform an IPCONFIG RELEASE/RENEW. You'll get a valid IP or an error message. Check KB for the error message.

3) Check DHCP/DNS client service status

- startup type : automatic

- startup status: started

-> Check if you get valid IP

restart Computer

-> Check if you get valid IP

4) Uninstall/reinstall network adaptor from device manager. Then restart computer &Check if you get valid IP

5) Manual Winsock fix

a) Click Start, and then click Run.

In the Open box, type regedit, and then click OK.

In Registry Editor, locate the following keys, right-click each key, and then click Delete:



When you are prompted to confirm the deletion, click Yes.

b) Install TCP/IP

Right-click the network connection, and then click Properties.

Click Install.

Click Protocol, and then click Add.

Click Have Disk.

Type C:\Windows\inf, and then click OK.

On the list of available protocols, click Internet Protocol (TCP/IP), and then click OK.

Restart computer & Check if you get vaild IP

6) referred to ISP