There is a Fn key to enable your wireless. This may be the F11 with a crossed symbol. Press once and you may enable your Bluetooth, Press again and the Wireless should be enabled, press again and it will disable both.
The lamp sequence should tell you where you are.
I have the same problem and I had never noticed that F11 key or the lamp sequence.
Unfortunately, pressing the F11 key elicted no reaction from the lamp, and still cannot connect.
It's so strange because this U123 had always worked everywhere where other people and other machines did not. Yesterday I used it at a bus terminal and ran out of power and today, after a recharge. no connections.