I try to configure a WLC4402 new out of the box. If I make a console connection for initial configuration I see the boot sequence in my terminal software but I am not able to send keyboard commands. the session does not accept keyboard input. I tried to do this with different PC's, different serial ports and different cables, including the supplied console cable. I have been testing with other devices (cisco router on console cable) and with these devices everything works fine. Only the WLC4402 gives me trouble. Any advice? Thank you.
Make sure that flow control is disabled on your terminal emulation program. Having flow control enabled will cause the exact issue you are describing.