i have read the manual for my HLN617W1 - rear projection 60 inch tv. the manual indicates that all three lights on the panel should be flashing, but only the top one flashes about 3 times very quickly then the middle one flashes and the bottom temp light does not light at all. should i assume it is the lamp? or is there another possible diagnosis. ps there is power in the unit, lights can be seen inside through the vent and the lights in front do flash as described above