What Country/State/Province do you live in? USA, Mississippi
Modem brand & model number: Motorola SB6120
Router brand & model number: D-Link DIR-655
Network Connection Type: Wireless
If Wireless, what type of encryption are you using? WPA2
If Wireless, are you using a white or black external adapter, or an internal (Xbox 360S) adapter? Internal
Things you have tried: I went through the entire "cannot connect" troubleshooting guide at www.xbox.com/networkhelp.
Is UPnP Enabled? Unknown
Is NAT Type Open? *shrug*
Any Error Codes you encounter: None
What type of internet do you have? Cable/DSL/T1/3G? Cable
Who is your ISP(Internet Service Provider)? Comcast
After you run "Test Xbox LIVE connection" and click on "More info", what is the exact message shown on screen? "Cannot connect to your wireless network"
This is pretty crazy... Apparently my 360 can simply no longer connect to my wireless network, at all. It started about 2 or 3 days ago. NOTHING has changed on any of my wireless settings since then. I have a desktop AND a laptop PC that both are connected to the internet via my wireless router and have experienced absolutely no problems in the past few days. The 360 boots up to the Guide menu already disconnected from Xbox Live. If I check my network settings, my wireless network shows up in the list, with 4 full bars of signal strength and a little checkmark in the upper right corner of the selection frame, yet, for some reason, it acts as though the router isn't functioning or something (I'm getting a red X on the connection test between the 360 and the router).
This is completely beyond me. I'd appreciate any help on the matter.