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My problem is the MP721 Benq projector shutsdown immediately after it's tunred on...is there a power supply problem? How do I remedy this issue? Will the projector need to be entirely replaced, or can the power supply issue be corrected. Please advise. Thanks!

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  • sanjay s.damankar Sep 21, 2014

    first u check spectrum motor n below that sensor ...

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  • 79 Answers

You're right about the power supply issue, when they become faulty they are unable to supply the proper power to the projector, and thus it randomly shuts off. Also, you are able to just replace the power supply unit, I would suggest looking on ebay or contact Benq directly for a proper replacement part.

-David.

Posted on Nov 05, 2010

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Posted on Jan 02, 2017

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any questions, feel free to contact me
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That's a classic power supply failure. Usually, replacing the electrolytic capacitors in the power supply will be the remedy. Also, check for a blown fuse. Although, the fuse usually won't blow unless there is an internal problem.

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Turn On projector, press EXIT and Up Arrow buttons on projector for 5-6 seconds, lamp hours display will appear, press Auto on projector or its remote to reset lamp hours to zero, wait 5-6 seconds to display will get disappear itself.
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My benq projector turns on for a few minutes (light and fan going strong), then it shuts down.


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My benq projector keeps shutting off after about 30 seconds. Is there a reset switch, button or code?


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Benq Projector MP721 stops illuminating after about 1 minute on. The lights are as follows: Power: Off, Temp: Red, Lamp: Green. Shortly after the projector shuts off. Thoughts?? My assumption is that the...


it might be dusty enough to hold in the heat. it needs a good cleaning. use canned air. if you still have an issue, the fans might be running too slow or the thermister (temp sensor) may be faulty. sometimes if it gets too hot in there, the thermister needs to be replaced, too.

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