Question about BenQ PB7210 Multimedia Projector

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How do i fix the fans that don't work, and cause it to overheat?

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Depending on the problem with the individual fan--either it physically is not turning or it's not putting out a computer signal. Red is positive, black is negative(ground), and yellow is for the computer pulse--it tells the main board that the fan is turning. I've never been totally successful in repairing a fan for a projector. If it died due to heat expansion, (i.e, the motor binds and stops) you can't repair it. Sometimes, if the computer signal is gone, you can open up the motor and replace a bad component--remember, those fans operate in a HOT environment--better to try to find a replacement on the net. Look up Rotron (big manufacturer) and some laptop repair places--they can sometimes point you to sources of different size fans. I've found that in most cases, the fans were manufactured specifically for the projector company and you'll have to find one that is close enough in size and modify it to fit.---Rick

Posted on Sep 07, 2009

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The main device responsible for maintaining a constant temperature of your video card is the fan present in the processor. If this isn't functioning efficiently it's quite obvious that it would result in your video card overheating. If you don't regularly clean your computer, it could be highly likely that your fan is clogged with dust.

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