I can't troubleshoot this one. Without the details I have to write you replace the router.
A new Kindle and a 1 year old laptop are both having trouble connecting to the net via a wireless network that we use often. Recently the kindle, new in December could access wireless...but an X appears over the signal strength icon. No access to net. The wireless routers have been reset, another person with a laptop was able to get on the net...but we still can't. Any ideas on how to break thru...what setting should we look at? We have no trouble getting on other wireless at restaurants and getting to the net...why in this location are we not able to get thru?