I had been using Dell Inspiron 6400 for more than a year & recently I encounter one problem, do not know if this is the right thread to post my question.

There are 2 power on button for 6400, the normal on/off on the right to access WindowOS or the MediaDirect to go into MediaHome directly. Unfortunately, lately the MediaDirect button of my 6400 is not responding & only prompt me to a blue screen. Any idea why? Thanks.