Mitsubishi HC900 Projector shuts down after 5 minutes.

Hi,
I think your Display card not proper work so please contact LG Technician.

Thanks.

I had a similar issue. I put a brand new bulb in. Turns out the little door covering the lamp access wasn't fully closed. So I reclosed it and the blinking was replaced by solid red. Works now.

There are several things that can cause this problem, but the first thing I would check is the filter. The projector requires airflow to keep it cool. If airflow is blocked, the projector will overheat and shut down automatically.

It sounds like the lamp is going.
Do you know how many hours of use are reported on the lamp?

Many times these projectors have circuitry to shutdown when they suspect the lamp is near the end of life. Lamp hours vary and usually will go up to and even beyond expectancy, but there is occasions you can receive a bad lamp and have it blow in a matter of hours...not common but it does occur.

I hope this helps,
Magoo

FAULT: lamp of your projector is faulty.
Experience: when lamp life is near to end and environment temperature is too low you are facing the same problem and if you are facing this problem in normal temperature then also lamp is faulty.
Sulotion: Just replace the projector lamp

So, Shutting down to protect itself. The error light says it needs service, Cycling power makes it work for a few more minutes, then the Panasonic safety circuit shuts it down. Projector shuts down when bulb life gets to the danger zone, and also when its heat sensor says there is a problem.
So you have a bulb life issue or you have a dirty projector / fan cooling issue??

I say clean it up with some compressed air when it is cool, then check the # of hours the bulb has on it (in the menu).

Lastly brace yourself, the bulb is gonna hurt you :-$

mayme lamp life is over.see the lamp life.

Most likely you have a defective lamp or it is near the end of its life. It's also possible that the high voltage power supply is going out. You might check the lamp hours - you can find this in the advanced menu. Also check the air filter, if you haven't cleaned it, the airflow might be restricted, shutting down the projector.

The solution is a weird one. I had the same problem with my Sony Cienza VPL-HS1. Run for about 5 minutes and then the lamp would go out. The warning would show that Lamp/Cover was an issue. I assumed the lamp had reached its lifespan.
Wrong.
All it was, was the filter sitting in the filter box has a small trigger switch that turns off the lamp as a safety when someone inadvertently opens the cover for the filter.
Well, strangely enough, the box and the cover are sized in a way to expand when they heat up. (which they do aggressively) When they heat up they expand, and ever so slightly move the filter away from the switch far enough to trigger it to the off position (only about 1/64th of an inch).
Thats why when some of you tip your projector on its side it runs ok (gravity pushing the filter back in place).
The solution is to put a tiny strip of duct tape along the far edge (the edge opposite of the switch) of the filter on its plastic surround. This will snug-up the filter harder against the switch. Even when it tries to shift under expansion and contraction, it will not allow the switch to poke out far enough to turn off.
So, a penny of tape does the job!
JC Dallas Texas

Check to be sure the safety switch at the filter is not being tripped when the case and or the filter surround gets hot and expands. Thats what mine did.