What device are you trying to connect to the COM port?
When you use Hyper Terminal, remember to set the correct paramters: Bits per second, Data bits, etc. Safest to set it on Default.
If you still don't get output on hyperterminal, try using this:
http://www.aggsoft.com/com-port-stre...t/download.htm
to test your com port.
If you could check your device on a different COM port, or different PC it would be great.
Also remember to check Device Manager for
!,
? or
Xs