We have a projector that will not show anything on the screen. It shows Model # PRM-30A and Serial # 6156476 on the side of the projector.
When I turn it on, the Power light turns green. It sounds like it is reving up and then it quiets down and then revs up again and back down about 3-4 times and then the power button turns red again.
Nothing shows on the screen at any time.
We are using an HDMI cord with it, not that I think this has anything to do with it, but thought I would mention it.
The issue you have reported sounds like it could be a fault with possibly the lamp.
We would recommend testing another lamp from another PRM-30 projector if you are able to.
If the same fault follows I would recommend getting in touch with Promethean Technical Support directly.
Promethean Technical Support