Sony Vaio VGN - T1XP Wireless network connection unable to renew and get ip address when trying to connect to home WiFi network. This happend last week just out of the blue. It was working normally on wifi up until then. 1. ADSL wifi modem router works normally with other wifi devices (other wifi laptops, android smart phones, black berry etc) 2. Re-installed latest wifi driver on laptop. 3. Hard formatted HDD and Re-installed windows xp-pro and SP3 and ran the updates using normal wired LAN which works fine. 4. Re-installed avast anti virus and firewall updates. 5. Tested laptop wifi in a public hot spot at airport and laptop wifi connects and works normally. 6. I created a MAC address list on the ADSL modem with the MAC of my VAIO and allowed it to authenticate with a new SSID on the modem. This worked for a few hours and then stopped working as well. Is somebody deliberately blocking my wi-fi on this device? Have I been hacked or something? Ran anti virus scans on desktop pc and laptop sharing this modem and nothing.... I am out of ideas and really irritated by now.

SOURCE: wifi connection

try plugging the wireless mouse receiver into a different usb port
reboot your machine
is there a key on the keyboard with a little wireless symbol? if so it is probably in blue and there is fn key that you need to hold down while you press the wireless key to turn on the wireless

SOURCE: Recently bought a Sony Vaio

Can you try the laptop somewhere else? Try Mcdonalds or Starbucks, work, school, etc. Does it see the connection there? Does it connect ok there. Break your troubleshooting it into small steps. If it works else where then something is set wrong in your wireless at home. If it doesn't work else where then keep troubleshooting the laptop itself. When your watching the SSID show up then disappear are all wireless SSID also doing the same. Can you see neighbor and just watch if they drop in and out? Can you confirm your router is the same network speed. B,G or N. Make sure its a on a speed the laptop can do. Can you change your router and disable the security for a little while and see if that effects how the laptop connects. IF it works without security then check your security settings, Maybe the router is set to an old or newer type if security, Try different one's if it works correctly with security off. Can you login into your router and look at the logs its recording. Maybe there's a clue in it. Re-confirm the gateway and subnet are correct. I don't know if your XP, vista or 7, but open a command window or Dos prompt and type "ipconfig /a" It will list all the network information. Also type "ipconfig ?" For a list of options to use with the command. You may need to a release or renew the connection.

Testimonial: "Offered solutions that I haven't thought about"

SOURCE: wifi not working on my sony vaio vgn-nw270f

make sure you turn the wireless switch on. It should be on either side or the front of the laptop.

Did you configure the new router and set the wireless on it?

If your internet provider is a phone company such as AT&T did you configure the router to be PPOE (and set the userid and password) and bridged the modem that goes into the router?

If your internet provider is a cable company did you set the router to be DHCP?

Does the Sony even see the wireless network in the View Available Wireless Networks list?

Did you put the wireless key in correctly?

You didn't by chance happen to hit the FN function key on the lower left portion of the keyboard + the key (F1 thru F12) that toggles the wireless on and off? The correct F1 thru F12 key to hit will have the wireless signal icon )))) or it will have the icon of a tower with the wireless signal )))).