Question about InFocus SP-LAMP-017 Projector Lamp for LP540, LP640, C16

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InFocus LP540 Power Supply Problem

I have power supply problem with my InFocus LP540 projector. I found that IC part number U500 on power supply board was burn out. Somebody please help me by show the serial number of IC part U500 or send me the schematic diagrams. Thank you for your assistance.

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  • Anonymous Mar 14, 2014

    is there a way to get the serial numbers from infocus with out looking on the front or back, as the projectors are mounted on the wall



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Most of infocus parts are oem and made by a company in taiwan that no longer makes power supplies, and many of the parts have their stock numbers and not neccesarily a common stock. the power supply, however, is in stock at infocus for about $65.

Posted on Jul 17, 2009


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The projector comes on but shuts down after only a minute or so.

1. check your lamp---take it and look into it and see if you see any cracks or bubbles in the mirror part and try and look at the stem IN the mirror for any bulges that might look like a vein about to explode---if so the lamp is bad. you need to make sure all fans are working.
3. if it's not the lamp or the fans, then it goes-power supply, main board.

Aug 26, 2010 | InFocus LP540 LCD Projector

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Won't power up

if there are no led lit, replace the power supply.

Nov 06, 2009 | InFocus SP-LAMP-017 Projector Lamp for...

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Help me how to open the lp540 power supply show me diagram

Best would be to download the users manual which should be having clear directions for your pupose. A link from where you can download this manual is: Hope that helps.............sodeep

Jul 26, 2009 | InFocus Office Equipment & Supplies

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Infocus projector power supply dead

the caps dry out. look for bulging caps. you won't find a schematic for the ps boards. infocus had someone else make them. the problem seems more like a overheating issue. as for the other one with the "just the fans", check the colorwheel.

Oct 03, 2008 | InFocus POWER SUPPLY CORD Multimedia...

1 Answer


good luck. not even the infocus authorized service centers get those. besides, they were made by another company that does not make power supplies antmore. and infocus doesn't have any new ones in stock. if you're getting no power at all, replace the mosfets. it works half of the time.

Sep 20, 2007 | InFocus SP-LAMP-017 Projector Lamp for...

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