BENQ MP515ST When turned on it whirrs for a bit the lamp does not light during this time. The power light flashes (Orange) for a about 30 secs goes off and then the lamp light goes to red which remains constantly on untill turned off at mains. Anybody got a clue as to what is happening and if it can be fixed. It is out of warranty so do not mind opening it up if it is a reset button