Hello

OK, this is most probably a result of bulb damage. The bulbs in these units are very sensitive, hence, an kind of hard knock, will damage the bulb.

There is not much that can go wrong with projectors, it is either the bulb or the power supply. In this case, the bulb.

I really hope you can find this helpful. Please d not hesitate t let me know if you need any further assistance.

Kind regards
Andrea