I started the projector this morning and the picture came up just fine for about 15 seconds and then it went out. The cooling fans run fine but now I get nothing from the bulb. I replaced the bulb about 150 hrs ago so it should be fine. Now what happens is when I turn the machine on, the cooling fans start up but the bulb doesnt come on and after about a minute the machine turns itself off. I clean the filter regularly and was very careful replacing the bulb so I am lost as to what the problem might be. Faulty bulb?