Question about BenQ PB6100 Multimedia Projector

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Benq pb6100, light bulb does not on, power ok

All 3 lights on, light bulb does not come on, no fan

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  • Anonymous Aug 11, 2008

    I have the exact same problem, the 3 lights come on, but only the power supply fan works. The two in the back won't turn and the bulb won't turn on. Did you find a solution?

  • 5679fy Aug 31, 2008

    Local power failure burnt the UPS motherboard capacitor and a few resistors. I always have the projector plugged in, and I learned the UPS is only active when there is a power failure - which meand the projector was connected to local power, but not powered on. I had the UPS fixed, but now the projector's fans do not come on, the green power light blinks for afew minutes then the red lamp bulp stats blinking. Could I have blown the bulb without the unit being turned on?

  • giorgio69er Dec 11, 2008

    I have the same problem. Projector worked like a dream, then one day, just won't come on. Power supply fan spins and green LED's come on, but lamp and cooling fans do not come on. Only about 600 hours on lamp. I'd be forever indebted to whoever can provide the solution to this.

  • Anonymous Feb 07, 2009

    Help!

  • Pipomiguel Apr 09, 2009

    Hi,

    First of all, sorry for my bad english

    When I turn on the projector, the "lamp" led blinks (in red) and the bulb doesn´t work. Fans do work, or al least they sound like it...

    Lamp usage hasn´t exceeded 3.000 hours so I guess there´s other problem

    Can somebody help me?

    Thanks!!

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I fixed the exact same problem on my PB6200. Both back fans were not working, and the bulb would not turn on.

In my projector, the fan board had a bad capacitor. The fan board is the one where all 3 fans are connected, and which is facing upside down on top of the powerboard. The bad capacitor on my projector was coded C7302 on the schematics. It's a brown, 25v 470uf capacitor.

I recommend you to open your projector, unplug all connections to the fan board, turn it upside, and inspect the capacitors and other components. Bad capacitors have a bulge and/or a black stain or fluid coming out on the top. You can find pictures on the net.

Posted on Mar 04, 2009

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I had the exact same problem, I followed the advice of Victorbello on this thread, and found a bulging capacitor where he suggested to look.
I soldered in a new one from Radio Shack ($1.50) and the projector works again.
PB6200 symptoms: Back fans were not working Bulb won't light (but is in perfect condition) LEDs on control buttons are lit, but not three status LEDs Smaller internal fan will not turn off.

Solution:
The mainboard had a bad capacitor
The board is the one where all 3 fans are connected, and which is facing upside down on top of the powerboard.
The bad capacitor on my projector was a 25V 470uf 10mm diameter, 16mm high, 5mm lead spacing capacitor.

"I recommend you to open your projector, unplug all connections to the fan board, turn it upside, and inspect the capacitors and other components. Bad capacitors have a bulge and/or a black stain or fluid coming out on the top."

Posted on Aug 30, 2010

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Thanks bobbyj, but how do I check the lamp for physical failure? The lamp was not on when we had the power failure so it could not have burnt out, but I'll check it with a little help.

Posted on Sep 03, 2008

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Had the same problem with my PB6200. It now turns on after replacing the capicitor, but still can't get a picture to show. all lights show it's working. What do i do next.

Posted on Feb 06, 2010

  • Mike Huck Jun 04, 2013

    I had the same fan fail problem with my PB6200. I replaced the bad capacitor, and the fans and bulb come on, but no picture. Were you able to figure out to fix this next problem?

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Remove the lamp and check it for physical failure, also claen the air flow filters for clogs.

Posted on Jan 22, 2008

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