1100mp Dell Projector Turning off after 5 minutes Help!!

I have a 1100MP Dell Projector, as soon as I turn the projector on it flashes the temp and lamp light on for a second then goes off. 

The projector will only go on for a around five minutes then seems to overheat and turn off and just for five minutes it gets very hot. The projector fans seem to be fine and working, obviously I have tried to see if the fans are working fine with it on but the micro-switch stops the projector from turning on unless the unit is screwed together. I need some help on this issue. The bulb seems to be operating fine in those five minutes so I would not isolate the issue down the bulb?