Question about HP Digital Projector xb31 Multimedia Projector

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HP XB31 Projector heat senor

Hi, i believe that the heat sensor is defected on my XB31 HP Projector.

How can i replace it / where is it located / what does it looks like ?

Thanks. Marc

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  • deadxb May 09, 2008

    My xb31 has either a fuse or sensor or other issue as well: It does not respond to power in any way, no lights, no nothing. Are there any user-replaceable items that would cause this? It's not the bulb, since the bulb is new. It does not power u0... Help! Thanks, Alan L



4 Answers

Hi, i solved the problem by opening the projector cover and placing/making sure that the left fan was in the the right place ...
on the bottom tracks but make sure to align the fan with the top cover track as well .... in other words, if the left fan is not *exactly* in it slots (top & bottom) ... a slight degree misplaced (fan) and the projector over heats...

- this happened during a change of lamps : + the lamp that was on was not even broke.. !!

- it can occur too during shipping or just manutention...


Posted on Aug 28, 2008


Hi, well the projector will work for +/- 1h30 then overheats and shuts down. The light indicates overheat, not temperature problem.. in the specs.. anyways, i put a new lamp in and it still does the same thing. It worked for 4-5 hours without shutting down when i tried it with the top cover open at 1 inch.
Thanks for your interest. Marc.

Posted on May 21, 2008

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I am having somewhat the same problem...bulb is also new here.....But when I turn mine on the bulb light turns on(the one with the bulb and lightning bolt) and the picture turned off...I tried it this morning and unplugged it and video worked...but now no those are the symptoms...can anyone help?

Posted on May 21, 2008

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Hi Marc

How do you know that the sensor needs replacement ?

Could you please give me some of the sympoms first ?

This could be something other than a sensor.

Posted on May 06, 2008

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Posted on Jan 02, 2017

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Hi sun_md

This sounds like a typical temp. sensor that is faulty.

If you take off the top cover of the Projector and follow the cables from your fans to the Mainboard - you'll find a smallish board that regulates the heat of the Projector. You will also find another sensor on top of the lamp housing.

Try replacing the sensor that goes with the fans first , this is normally the one giving problems.

Good luck and thanks for using Fixya !

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