Mistub XD450. Bulb relatively new. Projector

hi,
All projectors have self dioganisng function. If there is any malfuction inside the projector it will indicated by the LED blinking. You have to inspect how many time the LED blinks or which LED lights condinuosly. LED meas the power light or the lamp light. Then only anybody can suggest you a better solution.
ok

try it without the ups unit, just in case the ups unit is dodgy

Yes, if bulb was low price and was installed in old lamp casing then it is bulb that is not good and creating too much heat that exhaust fan can't throw out to make projector cool enough so temp sensor activates and send over heat signal to system control chip thus projector shuts down.
Please install original lamp that comes with casing to solve this issue.
If lamp was original then check exhaust fan that might be running slowly due to stiffness in bearing so temp sensor finds over temp in projector.
Hope these info will help you.
Thanks.

try reseting the lamp timer and then replace the lamp if it works

I have PJ 550 exact SAME PROBLEM replaced bulb NOTHING

Yupe, you need new lamp. Ouch.

Hello,
Well there are only a couple of things that could cause this problem. However considering this all started when it was mounted consider the possibility you may have used screws that are too long and are is/are subsequently shorting something out.


Cheers

Stripped projector ( including removal of bulb ) and cleaned internals
re assembled and all A1

RR

Hi there.

How many hours had it done? The bulb may have expired and as a safety precaution the projector will not switch on, otherwise the bulb will explode causeing further damage.

Cheers

It's not a short, the blub is near the end of it's life ~ the optoma is designed to detect when the blub is about to blow and shuts itself down. Turning the projector upside down or right side up usually only gives you a brief reprieve (some have reported a modest amount of extra time gained) on the blub ~ but in the end it's on it's way out and the projector will shut down again.