Question about BenQ PE8700 Multimedia Projector

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Rest benq pe8700 projector

I have replace the cooling fan on a Benq PE8700 projector but when I turn the unit on the projector will not startup

Also there is red led that is on (steady) located on the small PC board
on top of the lamp power supply (back of the unit right hand side)

The green (power) led is on steady and the red led (lamp) is flashing.

I try also replacing the lamp.

Is there some type of reset procedure for this projector ?

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If the lamp comes on, hold the exit button down until the osd comes on. press enter, then the right or left arrow button to reset it, then the exit.

Posted on Nov 12, 2009

  • Pete Tremmel Feb 06, 2011

    Hi, John1744 (and projdoc) Where did you find the cooling fan for the Benq PE8700? Mine is making noise, and I think the bearing is going. I also was trying to find a new power supply as well. Any information is Greatly Appreciated !! ! ! petetremmel@yahoo.com
    Thx ! !

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1 Answer

Can I replace the fan and how do I do it for a Benq PE8700


If the lamp LED flashes red, it indicates that the front cover is not installed properly, the fan is not working, the translation board is defective or the ventilation holes are blocked.

The first thing I would try is to remove the lamp assembly and try reinstalling. (Did you purchase a genuine BenQ lamp assembly)?

If ok, you can download a service manual here (but be advised, this is not for the unqualified. You should seek repair through your dealer).

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There's more then one fan inside the projector. I think I counted 3 when I opened mine up. Two are easy to get to, the other is underneath. on theleft side looking from the front. You have to take off the back surround cover in onder to remove the top cover. The top cover slides back and lifts up. Be careful because there's a wire harness running to the top cover control panel. Disconnect it then you have access to the fans. Wish mine was that easy to repair.

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I'm a approved BenQ Technician in JHB South Africa - and I've done this before.

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Trust me that the Mainboard needs replacement.

I am very familiar with the PE8700's as I am a ASP Technician for BenQ.

Visit www.BenQ.com and look for the link to your country - you should be able to allocate a Approved Service Provider.

Must warn you that the Mainboards on these models are quite expensive.

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