I put together some things to try for the NC awhile back. Some of it isn't directly relevant - the stuff about router models that are known to have problems, because we don't have that experience with the NT yet - but a lot of it is relevant.
http://nookworks.blogspot.com/2011/05/my-nc-cant-talk-to-my-wireless.html
First, try the obvious: hold the power button on your NC in > 15 seconds. Ignore the "do you want to shut down?" dialog. Your NC will power down. Power back on. This process resets some components, and some folks find it helpful. I include it here, but I realize you probably already tried it. More than once.
Another obvious one: are you sure you're entering and sending the wireless password correctly?
Test the password by making a new connection to the AP from a computer or other device in the house. Then, forget your connection on the Nook Color and set it up fresh. Untick the "hide my password" button in the password settings, so you can see what you are typing. Check that your Nook Color and your router agree on both the password and encryption setting (WPA, WEP, WPA2, etc.) you are using.
Now to some of the less-obvious:
1) Take a look in Settings.... Wireless... If your nook color remembers more than 10 wireless networks (these are not just the networks displayed, but those with stored passwords - they are displayed as "remembered") go in and forget a few of the ones you use least often.
The nook color can only store 10 networks' login data, or so I have read. So select and forget a few of the ones that say "remembered" but are out of range. Now try connecting to your AP again.
No?
2) find out what router or access point model you have, and what software it is running. If an update is available from the manufacture, install it and see if your NC can connect after you reboot both devices.
No?
3) Once your router is up-to-date, try this, making each of these changes together:
- tell your router to run in G only or G/N if you'd immediately kill services you need by disabling N.
- Disable MAC filtering
- Disable WEP and WPA
- Put speed in "auto" and channel in "auto" rather than manually setting either
- Broadcast your SSID
- Try setting your lease time to a very long interval - 1 week if possible
If you make those changes you may well be able to connect. Then you can start walking the changes back one at a time.
On the N band setting, you may not be able to "lock" the router at its highest speed or anything close to it under 1.2. You may not be able to use N at all (some Cisco access points in N just don't work with NCs running N, but do work with NCs running G.)
Most folks are ultimately able to hide SSID, use WPA-2 and MAC filtering all without problems.
There is some very interesting juju happening with WEP. Some WEP connections won't work; if your router only supports WEP, be aware that at one time BN was advising customers that WEP was not supported. To connect to Nook Colors, some WEP-only routers need to be in "open" WEP key mode, some need to be in "shared" WEP key mode, and the Nook Color cannot connect to some.
If your router only supports WEP, as a network guy, I would recommend you replace it and get a router with WPA-2.
Frankly, you might as well run your router without a password until your replacement arrives. Use a different method to secure it (MAC address filtering, all by itself, is far more effective than WEP, and simply not broadcasting your SSID is probably as effective as WEP.)
If you are unable to connect your NT to your access point after updating your AP softwareand turning off the bells and whistles on your router,
please let BN know that you followed this guide and could not establish a connection. Please also give them the model # of your router or access point.
BN doesn't have a copy of every AP in the universe and right now I think it makes sense to help them identify problem models. APs are commodity hardware. Most run one of a relatively few Linux kernels and a relatively few wireless and ethernet chipsets. The more problem routers BN knows to test, the sooner they'll find a pattern.
